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American Museum of Natural History

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    The Museum is open daily from 10 am to 5:45 pm except on Thanksgiving and Christmas. 

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  • Exhibitions

    • Current Exhibitions

    • Butterfly Conservatory
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    • Countdown to Zero: Defeating Disease
    • ¡Cuba!
    • Dinosaurs Among Us
    • Humpback Whales

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    • The Titanosaur
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  • Our Research

    • Divisions

    • Anthropology
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Explore

  • Science Topics
  • Kids Guide to the Museum
    • Answers to Find Me!
  • Resource Collections
    • Biodiversity Crisis
      • Brown-Eyed, Milk-Giving
      • Reefs in Crisis
      • Jaguars
      • The Green Guerillas
      • Wilderness Preservation Act
      • St. Lucia Parrot Recovery
      • Restoration of the Elwha River
      • Lake Victoria
      • Profile: Michael Balick
      • PROFILE: Penelope Bodry-Sanders
      • PROFILE: Kevin Browngoehl
      • PROFILE: Clare Flemming
      • PROFILE: Abebe Getahun
      • PROFILE: Jane Goodall
      • PROFILE: Jaime A. Pinkham
      • PROFILE: Dolores R. Santoliquido
      • PROFILE: Amy Vedder
      • The Biodiversity Crisis: Losing What Counts
      • The Ethnobotany Reserve Project
    • Cosmic Horizons
      • Case Study: Friedrich Bessel and the Companion of Sirius
      • Case Study: Gerard Kuiper and the Trans-Neptunian Comet Belt
      • Case Study: John Michell And Black Holes
      • Case Study: Fossil Microbes on Mars?
      • Case Study: Neutrino Observatories
      • Case Study: The Cosmic Microwave Background Radiation
      • Profile: Ernst Chladni and Rocks from the Sky
      • Profile: Georges Lemaître, Father of the Big Bang
      • Profile: Cecilia Payne and the Composition of the Stars
      • Profile: Ole Roemer and the Speed of Light
      • Profile: Vera Rubin and Dark Matter
      • Profile: Carl Sagan and the Quest for Life in the Universe
      • Profile: Lyman Spitzer and the Space Telescope
      • Profile: Fritz Zwicky's Extraordinary Vision
      • Profile: Harold C. Urey
    • Earth Inside and Out
      • A Conversation with Jacques Malavieille
      • Forecasting Earthquakes Using Paleoseismology
      • Looking For Life In Antarctica
      • Mapping Hot Springs on the Deep Ocean Floor
      • Mapping Mt. Rainier
      • Retrieving a Stromatolite from the Sahara Desert
      • Studying Tree Rings to Learn About Global Climate
      • Ultra-High-Pressure Experimentalist Who Studies the Deep Earth
      • Zircon Chronology: Dating the Oldest Material on Earth
      • Earth: Inside and Out Glossary
      • Harry Hess: One of the Discoverers of Seafloor Spreading
      • Arthur Holmes: Harnessing the Mechanics of Mantle Convection to the Theory of Continental Drift
      • James Hutton: The Founder of Modern Geology
      • Inge Lehmann: Discoverer of the Earth's Inner Core
      • Milutin Milankovitch: Seeking the Cause of the Ice Ages
    • SunScapes: Our Magnetic Star
    • Online Field Journals
      • Make an Ecosystem Diorama
      • Nature Explorations
    • Student Work from LeFrak Class of the Month Contest Winners
      • LeFrak Class of the Month Essay Contest - Creatures of Light Sample Winning Essays
        • Yorkville Community School - LeFrak Class of the of the Month Winners
          • Sample winning essay for Creatures of Light LeFrak Class of the Month Contest - Abdoulaye
          • Sample winning essay for Creatures of Light LeFrak Class of the Month Contest - Aiden
          • Sample winning essay for Creatures of Light LeFrak Class of the Month Contest - Jayla
        • P.S. 20 P.O.George J. Werdan III - LeFrak Class of the of the Month Winners
          • Sample winning essay for Creatures of Light LeFrak Class of the Month Contest - Shpat
          • Sample winning essay for Creatures of Light LeFrak Class of the Month Contest - Roberto
          • Sample winning essay for Creatures of Light LeFrak Class of the Month Contest - Karla
      • LeFrak Class of the Month Essay Contest - Whales: Giants of the Deep Sample Winning Essays
        • P.S. 056 Harry Eichler - LeFrak Class of the of the Month Winners
          • Sample winning essay for Whales: Giants of the Deep Class of the Month Contest - Nicole
          • Sample winning essay for Whales: Giants of the Deep Class of the Month Contest - Kirandeep
          • Sample winning essay for Whales: Giants of the Deep Class of the Month Contest - Jasleen
        • J.H.S. 202 Robert H. Goddard - LeFrak Class of the Month Winners
          • Sample winning essay for Whales: Giants of the Deep Class of the Month Contest - Brianna
          • Sample winning essay for Whales: Giants of the Deep Class of the Month Contest - Tiona
          • Sample winning essay for Whales: Giants of the Deep Class of the Month Contest - Bhagwantie
        • P.S. 130 Hernando DeSoto - LeFrak Class of the Month Winners
          • Sample winning essay for Whales: Giants of the Deep Class of the Month Contest - Dina
          • Sample winning essay for Whales: Giants of the Deep Class of the Month Contest - Rachel
          • Sample winning essay for Whales: Giants of the Deep Class of the Month Contest - Jason
        • P.S. 121 Throop - LeFrak Class of the of the Month Winners
          • Sample winning essay for Whales: Giants of the Deep Class of the Month Contest - Sumat
          • Sample winning essay for Whales: Giants of the Deep Class of the Month Contest - Brianna
          • Sample winning essay for Whales: Giants of the Deep Class of the Month Contest - Maisha
        • P.S. 20 Anna Silver - LeFrak Class of the Month Winners
          • Sample winning essay for Whales: Giants of the Deep Class of the Month Contest - Xyila
          • Sample winning essay for Whales: Giants of the Deep Class of the Month Contest - Sadia
          • Sample winning essay for Whales: Giants of the Deep Class of the Month Contest - Simon
      • LeFrak Class of the Month Essay Contest - Pterosaurs: Flight in the Age of Dinosaurs Sample Winning Essays
        • St. Clare School - LeFrak Class of the Month Winners
          • Sample winning essay for Pterosaurs: Flight in the Age of Dinosaurs Class of the Month Contest - Courtney
          • Sample winning essay for Pterosaurs: Flight in the Age of Dinosaurs Class of the Month Contest - Gabrielle
          • Sample winning essay for Pterosaurs: Flight in the Age of Dinosaurs Class of the Month Contest - Sean
          • Sample winning essay for Pterosaurs: Flight in the Age of Dinosaurs Class of the Month Contest - Nicole
        • P.S. 009 Sarah Anderson School - LeFrak Class of the of the Month Winners
          • Sample winning essay for Pterosaurs: Flight in the Age of Dinosaurs Class of the Month Contest - Max
          • Sample winning essay for Pterosaurs: Flight in the Age of Dinosaurs Class of the Month Contest - Jessie
          • Sample winning essay for Pterosaurs: Flight in the Age of Dinosaurs Class of the Month Contest - Ty
          • Sample winning essay for Pterosaurs: Flight in the Age of Dinosaurs Class of the Month Contest - Silvana
          • Sample winning essay for Pterosaurs: Flight in the Age of Dinosaurs Class of the Month Contest - Jordan
          • Sample winning essay for Pterosaurs: Flight in the Age of Dinosaurs Class of the Month Contest - Ben
        • PS 056 Harry Eichler - LeFrak Class of the Month Winners
          • Sample winning essay for Pterosaurs: Flight in the Age of Dinosaurs Class of the Month Contest - Sukhmandeep
          • Sample winning essay for Pterosaurs: Flight in the Age of Dinosaurs Class of the Month Contest - Allison
          • Sample winning essay for Pterosaurs: Flight in the Age of Dinosaurs Class of the Month Contest - Ranjoy
          • Sample winning essay for Pterosaurs: Flight in the Age of Dinosaurs Class of the Month Contest - Luke
        • PS 031 The William Lloyd Garrison - LeFrak Class of the Month Winners
          • Sample winning essay for Pterosaurs: Flight in the Age of Dinosaurs Class of the Month Contest - Nalani
          • Sample winning essay for Pterosaurs: Flight in the Age of Dinosaurs Class of the Month Contest - Tyrese
          • Sample winning essay for Pterosaurs: Flight in the Age of Dinosaurs Class of the Month Contest - Mia
      • LeFrak Class of the Month Essay Contest - Life at the Limits: Stories of Amazing Species Sample Winning Essays
        • PS 121 Throop - LeFrak Class of the Month Winners
          • Sample winning essay for Life at the Limits: Stories of Amazing Species Class of the Month Contest - Xavier
          • Sample winning essay for Life at the Limits: Stories of Amazing Species Class of the Month Contest - Elayah
          • Sample winning essay for Life at the Limits: Stories of Amazing Species Class of the Month Contest - Malyla
        • PS 9 Sarah Anderson School - LeFrak Class of the Month Winners
          • Sample winning essay for Life at the Limits: Stories of Amazing Species Class of the Month Contest - Solveig
          • Sample winning essay for Life at the Limits: Stories of Amazing Species Class of the Month Contest - Amelia
          • Sample winning essay for Life at the Limits: Stories of Amazing Species Class of the Month Contest - Sabrina
          • Sample winning essay for Life at the Limits: Stories of Amazing Species Class of the Month Contest - Alessia
          • Sample winning essay for Life at the Limits: Stories of Amazing Species Class of the Month Contest - Olive
          • Sample winning essay for Life at the Limits: Stories of Amazing Species Class of the Month Contest - Zoe
        • The Hewitt Schooll - LeFrak Class of the Month Winners
          • Sample winning essay for Life at the Limits: Stories of Amazing Species Class of the Month Contest - Alex
          • Sample winning essay for Life at the Limits: Stories of Amazing Species Class of the Month Contest - Phoebe
          • Sample winning essay for Life at the Limits: Stories of Amazing Species Class of the Month Contest - Taylor
          • Sample winning essay for Life at the Limits: Stories of Amazing Species Class of the Month Contest - Sofia
          • Sample winning essay for Life at the Limits: Stories of Amazing Species Class of the Month Contest - Chloe
          • Sample winning essay for Life at the Limits: Stories of Amazing Species Class of the Month Contest - Elizabeth
      • LeFrak Class of the Month Essay Contest - Mummies Sample Winning Essays
        • P.S. 56Q - LeFrak Class of the of the Month Winners
          • Sample winning essay for Mummies LeFrak Class of the Month Contest - Mya
          • Sample winning essay for Mummies LeFrak Class of the Month Contest - Sharon
          • Sample winning essay for Mummies LeFrak Class of the Month Contest - Anthony
          • Sample winning essay for Mummies LeFrak Class of the Month Contest - Janice
          • Sample winning essay for Mummies LeFrak Class of the Month Contest - Luis
    • Macmillan/McGraw Hill Science 2008
      • Science A Closer Look (Grade: K)
        • Life Science - Unit A (Grade K)
          • Nature Explorations
          • Make an Ecosystem Diorama
          • Plant Morphology
            • Parts of a Flower
            • Leaf Margins
            • Leaf Shape
            • Types of Compound Leaves
            • Leaf Type
            • Leaf Arrangement
            • The Parts of a Corn Seedling (Zea mays, Monocotyledon)
            • The Parts of a Soybean Seedling (Glycine max, Dicotyledon)
          • Parts of a Flower
          • Hall of Biodiversity Educator's Guide Activity: Observation
        • Life Science - Unit B (Grade K)
          • Make an Ecosystem Diorama
          • Lizards & Snakes: Alive! Coloring Book
          • For Educators
          • Frogs: A Chorus of Colors
          • Hall of Biodiversity
          • Milstein Hall of Ocean Life
          • Bernard Family Hall of North American Mammals
        • Earth Science - Unit C (Grade K)
          • Spectrum of Habitats
          • Living with Biodiversity Series
          • For Educators: Water
          • Nature Explorations
          • David S. and Ruth L. Gottesman Hall of Planet Earth
          • Water: H2O = Life
        • Earth Science - Unit D (Grade K)
          • Building a Cloud Chamber (Cosmic Ray Detector)
          • Seasonal Cycle
          • David S. and Ruth L. Gottesman Hall of Planet Earth
        • Physical Science - Unit E (Grade K)
        • Physical Science - Unit F (Grade K)
      • Science A Closer Look (Grade 1)
        • Life Science - Unit A (Grade 1)
          • Chapter 1 - Plants are Living Things
            • Nature Explorations
            • Make an Ecosystem Diorama
            • Who Are the Plants?
            • Plant Morphology
            • Plant/Arthropod Interactions
          • Chapter 2 - Plants Grow and Change
            • Nature Explorations
            • Leaf Shape
            • Parts of a Flower
            • Saguaro Cactus: From Life to Death
            • Plant Morphology
        • Life Science - Unit B (Grade 1)
          • Chapter 3 - All About Animals
            • What Teeth Tell Us
            • Lizards and Snakes: Alive!
            • Milstein Hall of Ocean Life
            • Hall of Biodiversity
            • Hall of Biodiversity Educator's Guide Activity: Observation
            • Frogs: A Chorus of Colors
          • Chapter 4 - Place to Live
            • Make an Ecosystem Diorama
            • Water: H2O = Life
            • For Educators: Water
            • Milstein Hall of Ocean Life
            • Spectrum of Habitats
        • Earth Science - Unit C (Grade 1)
          • Chapter 5 - Looking at Earth
            • Transformation of the Bioshphere: Global Environmental Change
            • Just Add Water!
            • Water: H2O = Life
            • For Educators: Water
            • David S. and Ruth L. Gottesman Hall of Planet Earth
          • Chapter 6 - Caring for Earth
            • Oscawana: A Dying Lake?
            • Bronx River Restoration
            • Living with Biodiversity Series
            • For Educators: Water
        • Earth Science - Unit D (Grade 1)
          • Chapter 7 - Weather and Seasons
            • Living with Biodiversity Series
            • Transformation of the Bioshphere: Global Environmental Change
            • Building a Cloud Chamber (Cosmic Ray Detector)
            • Seasonal Cycle
            • David S. and Ruth L. Gottesman Hall of Planet Earth
          • Chapter 8 - The Sky
            • Sea Ice and Climate in Antarctica
            • Living with Biodiversity Series
            • Dorothy and Lewis B. Cullman Hall of the Universe
            • Rose Center for Earth and Space
        • Physical Science - Unit E (Grade 1)
          • Chapter 9 - Matter Everywhere
          • Chapter 10 - Changes in Matter
            • Create a Polar Creature
            • Milstein Hall of Ocean Life
        • Physical Science - Unit F (Grade 1)
          • Chapter 11 - On the Move
            • Newton's Laws of Motion and Gravity Applied to Meteorites
          • Chapter 12 - Energy Everywhere
            • Amazing Albedo
            • How the Sun Works
            • White Light and Colored Light
      • Science A Closer Look (Grade 2)
        • Life Science - Unit A (Grade 2)
          • Chapter 1 - Plants and Animals
            • Make an Ecosystem Diorama
            • Nature Explorations
            • Plant Ecology
              • Calculating a Biodiversity Index
              • How to Calculate a Biodiversity Index
              • How to Identify Plants in the Field
            • Plant Morphology
              • Parts of a Flower
              • Leaf Margins
              • Leaf Shape
              • Types of Compound Leaves
              • Leaf Type
              • Leaf Arrangement
              • The Parts of a Corn Seedling (Zea mays, Monocotyledon)
              • The Parts of a Soybean Seedling (Glycine max, Dicotyledon)
            • Who Are the Plants?
            • Saguaro Cactus: From Life to Death
            • Plant/Arthropod Interactions
          • Chapter 2 - Animals
            • Make an Ecosystem Diorama
            • Nature Explorations
            • Lizards & Snakes: Alive! Coloring Book
            • Science Explorations: Investigate the Giant Squid
            • Science Explorations: Uncover Lizards and Snakes
            • Science Explorations: Animals, Adaptation, and the Galápagos Islands
            • Milstein Hall of Ocean Life
            • Frogs: A Chorus of Colors
        • Life Science - Unit B (Grade 2)
          • Chapter 3 - Looking at Habitats
            • Make an Ecosystem Diorama
            • What is a Fossil?
            • The Spectrum of Life
            • Milstein Hall of Ocean Life
          • Chapter 4 - Kinds of Habitats
            • Make an Ecosystem Diorama
            • Water: H2O = Life
            • For Educators: Water
            • The Impact of Plant Density and Diversity on Animal Populations in a Sonoran Desert Environment
            • Milstein Hall of Ocean Life
            • The Spectrum of Life
            • Aspen: A Keystone Species
        • Earth Science - Unit C (Grade 2)
          • Chapter 5 - Land and Water
            • The New Madrid Seismic Zone
            • Water: H2O = Life
            • David S. and Ruth L. Gottesman Hall of Planet Earth
            • Hall of Planet Earth for educators
          • Chapter 6 - Earth's Resources
            • Nature Explorations
            • Water: H2O = Life
            • For Educators: Water
            • David S. and Ruth L. Gottesman Hall of Planet Earth
            • Hall of Planet Earth for educators
            • All That Glitters (SuperScience)
            • Oscawana: A Dying Lake?
        • Earth Science - Unit D (Grade 2)
          • Chapter 7 - Observing Weather
            • What causes climate and climate change?
            • Building a Cloud Chamber (Cosmic Ray Detector)
            • Hall of Planet Earth for educators
            • David S. and Ruth L. Gottesman Hall of Planet Earth
          • Chapter 8 - Earth and Space
            • Transformation of the Bioshphere: Global Environmental Change
        • Physical Science - Unit E (Grade 2)
          • Chapter 9 - Looking at Matter
          • Chapter 10 - Changes in Matter
        • Physical Science - Unit F (Grade 2)
          • Chapter 11 - How Things Move
            • Environmental Alphabet
            • Crazy Cold Air
            • Gravity: It's Universal
            • Newton's Laws of Motion and Gravity Applied to Meteorites
          • Chapter 12 - Using Energy
            • Gathering Light
            • White Light and Colored Light
            • Amazing Albedo
            • How the Sun Works
      • Science A Closer Look (Grade 3)
        • Life Science - Unit A (Grade 3)
          • Chapter 1 - Living Things
            • Nature Explorations
            • Make an Ecosystem Diorama
            • Bats: Night Fliers (SuperScience)
            • Leaf Type
            • Lizards and Snakes: Alive!
            • Frogs: A Chorus of Colors
            • Milstein Hall of Ocean Life
            • Plant Morphology
            • Who Are the Plants?
          • Chapter 2 - Living Things Grow and Change
            • Nature Explorations
            • Saguaro Cactus: From Life to Death
            • Plant Morphology
            • Frogs: A Chorus of Colors
        • Life Science - Unit B (Grade 3)
          • Chapter 3 - Living Things in Ecosystems
            • Make an Ecosystem Diorama
            • Darwin: Voyage of Discovery (SuperScience)
            • Science Explorations: Animals, Adaptation, and the Galápagos Islands
            • Science Explorations: Uncover Lizards and Snakes
            • For Educators: Water
            • Frogs: A Chorus of Colors
            • Spectrum of Habitats
            • Milstein Hall of Ocean Life
          • Chapter 4 - Changes in Ecosystems
            • Body and Trace Fossils
        • Earth Science - Unit C (Grade 3)
          • Chapter 5 - Earth Changes
            • Just Add Water!
            • Let's Talk with Stephanie Shipp about Glaciers, Sea Ice, and Life on Antarctica
            • Plate Tectonics Puzzle
            • Dispatch from the Deep: Shaping the Ocean Floor at the Mid-Ocean Ridges
            • Water: H2O = Life
            • For Educators: Water
            • Inge Lehmann: Discoverer of the Earth's Inner Core
            • Forecasting Earthquakes Using Paleoseismology
            • David S. and Ruth L. Gottesman Hall of Planet Earth
            • Hall of Planet Earth for educators
          • Chapter 6 - Using Earth's Resources
            • Nature Explorations
            • Living with Biodiversity Series
            • What is a Fossil?
            • Water: H2O = Life
            • For Educators: Water
            • Transformation of Biosphere: Damage to Soils and Fresh Waters
        • Earth Science - Unit D (Grade 3)
          • Chapter 7 - Changes in Weather
            • Seasonal Cycle
            • What's the Angle?
            • David S. and Ruth L. Gottesman Hall of Planet Earth
            • Water: H2O = Life
            • For Educators: Water
            • Studying Tree Rings to Learn About Global Climate
          • Chapter 8 - Planets, Moons, and Stars
            • Mars: Past, Present, Future
            • The 3-D Universe
            • Afpectus Lunae: Does the Moon Rotate on Its Axis?
            • Dorothy and Lewis B. Cullman Hall of the Universe
            • Rose Center for Earth and Space
        • Physical Science - Unit E (Grade 3)
          • Chapter 9 - Observing Matter
            • Light: Its Secrets Revealed
            • Water vs. Land
          • Chapter 10 - Changes in Matter
            • All That Glitters (SuperScience)
        • Physical Science - Unit F (Grade 3)
          • Chapter 11- Forces and Motion
            • Crash Course? (SuperScience)
            • Einstein
          • Chapter 12 - Forms of Energy
            • Gathering Light
            • Building a Spectroscope
            • What's the Angle?
            • Amazing Albedo
            • White Light and Colored Light
            • Einstein
      • Science A Closer Look (Grade 4)
        • Life Science - Unit A (Grade 4)
          • Chapter 1 - Kingdoms of Life
            • Nature Explorations
            • Plant Morphology
            • Plant/Arthropod Interactions
            • Anne and Bernard Spitzer Hall of Human Origins
            • How to Set up Guest Quarters for Visiting Arthropods
          • Chapter 2 - The Animal Kingdom
            • Leapin' Lizards (SuperScience)
            • Science Explorations: Investigate the Giant Squid
            • One Gigantic Mystery (Science World)
            • Tide Pools and the Life Within Them
            • Biodiversity in Arizona
            • Lizards and Snakes: Alive!
            • Frogs: A Chorus of Colors
            • The Butterfly Conservatory
            • For Educators
        • Life Science - Unit B (Grade 4)
          • Chapter 3 - Exploring Ecosystems
            • Make an Ecosystem Diorama
            • Oscawana: A Dying Lake?
            • Aspen: A Keystone Species
            • How Do Humans and Plants Interact in Tidal Wetlands?
            • The Pantano Wash: Investigating an Ecosystem
            • Saguaro Cactus: From Life to Death
            • Exploring a Woodlot's Ecosystem
            • Water: H2O = Life
            • For Educators: Water
            • Hall of Biodiversity
            • Spectrum of Habitats
          • Chapter 4 - Suriving in Ecosystems
            • Science Explorations: Animals, Adaptation, and the Galápagos Islands
            • Squamate Fun Facts
            • Scaly Surprises (Science World)
            • Saguaro Cactus: From Life to Death
            • Light and Dark in the Sea
            • Science Explorations
              • Animal Adaptations
              • Bats
              • DNA Detective
              • Fossil Finds
              • Giant Squid
              • It Wants to Suck Your Blood (Science World)
              • It Wants to Suck Your Blood! (SuperScience)
              • Jade Hunter (Science World)
              • Planet Protectors
              • Science World: Mythical Creatures Revealed
              • Scorpions: Friend or Foe?
              • Space
              • Squamates
              • True Bugs
              • Wild Weather Birds
              • Wildlife Detective
            • Frogs: A Chorus of Colors
            • Antarctic Adaptations
            • Lizards and Snakes: Alive!
        • Earth Science - Unit C (Grade 4)
          • Chapter 5 - Shaping Earth
            • Just Add Water!
            • Plate Tectonics Puzzle
            • Meteorite Impacts
            • My Fish-Shaped Home: A History of Changes
            • Dispatch from the Deep: Shaping the Ocean Floor at the Mid-Ocean Ridges
            • Water: H2O = Life
            • For Educators: Water
            • Hall of Planet Earth for educators
            • David S. and Ruth L. Gottesman Hall of Planet Earth
            • Forecasting Earthquakes Using Paleoseismology
            • Inge Lehmann: Discoverer of the Earth's Inner Core
            • James Hutton: The Founder of Modern Geology
          • Chapter 6 - Saving Earth's Resources
            • Solve a Sedimentary Layers Puzzle
            • All That Glitters (SuperScience)
            • Oscawana: A Dying Lake?
            • The Mystery of a Lifeless Creek: Investigating Dissolved Oxygen and Fecal-Coliform Bacteria
            • What is a Fossil?
            • Water: H2O = Life
            • For Educators: Water
            • Hall of Planet Earth for educators
            • Transformation of Biosphere: Damage to Soils and Fresh Waters
        • Earth Science - Unit D (Grade 4)
          • Chapter 7 - Weather and Climate
            • Temperature & Albedo
            • Amazing Albedo
            • What's the Angle?
            • Seasonal Cycle
            • Studying Ice Flows for Clues to Climate Change
            • Building a Cloud Chamber (Cosmic Ray Detector)
            • Water: H2O = Life
            • For Educators: Water
            • Studying Tree Rings to Learn About Global Climate
            • Transformation of the Bioshphere: Global Environmental Change
            • David S. and Ruth L. Gottesman Hall of Planet Earth
          • Chapter 8 - The Solar System and Beyond
            • The Formation of the Solar System
            • Crash Course? (SuperScience)
            • Mars: Past, Present, Future
            • The 3-D Universe
            • Afpectus Lunae: Does the Moon Rotate on Its Axis?
            • Hall of Meteorites for educators
            • Dorothy and Lewis B. Cullman Hall of the Universe
            • Rose Center for Earth and Space
            • Arthur Ross Hall of Meteorites
        • Physical Science - Unit E (Grade 4)
          • Chapter 9 - Properties of Matter
            • Exploring Density
            • Water vs. Land
            • Cosmic Chemistry
            • Crazy Cold Air
            • Sinking Water
            • Einstein
            • Gold
            • The Abundance of Elements in the Sun
          • Chapter 10 - Matter and Its Changes
            • All That Glitters (SuperScience)
            • Cosmic Chemistry
            • All That Glitters (Science World)
            • Sinking Water
        • Physical Science - Unit F (Grade 4)
          • Chapter 11 - Forces
            • Crash Course? (SuperScience)
            • Gravity: It's Universal
            • Einstein
            • Newton's Laws of Motion and Gravity Applied to Meteorites
          • Chapter 12 - Energy
            • White Light and Colored Light
            • Einstein
            • Profile: Ole Roemer and the Speed of Light
            • Profile: Lyman Spitzer and the Space Telescope
      • Science A Closer Look (Grade 5)
        • Life Science - Unit A (Grade 5)
          • Chapter 1 - Cells and Kingdoms
            • Spitzer Hall of Human Origins Online Resources
            • Science Explorations
            • Saguaro Cactus: From Life to Death
            • Describing Oak Leaves
            • Leapin' Lizards (SuperScience)
            • Name That Critter
            • Lizards and Snakes: Alive!
            • Plant Morphology
          • Chapter 2 - Parents and Offspring
            • Metamorphosis
            • Who Are the Plants?
            • Parts of a Flower
            • Aspen: A Keystone Species
            • Saguaro Cactus: From Life to Death
            • Life in a Vernal Pool
            • Frozen in Time (Science World)
            • Go on a Genetic Journey Quiz
            • Frogs: A Chorus of Colors
            • The Butterfly Conservatory
            • Hall of Human Origins for educators
        • Life Science - Unit B (Grade 5)
          • Chapter 3 - Interactions in Ecosystems
            • Make an Ecosystem Diorama
            • Darwin: Voyage of Discovery (SuperScience)
            • Squamate Fun Facts
            • Science Explorations: Animals, Adaptation, and the Galápagos Islands
            • Scaly Surprises (Science World)
            • Antarctic Adaptations
            • Bees in the Ecosystem
            • Aspen: A Keystone Species
            • Plant/Arthropod Interactions
          • Chapter 4 - Ecosystems and Biomes
            • The Circle of the Food Chain and Decomposition
            • Tide Pools and the Life Within Them
            • Oscawana: A Dying Lake?
            • Troubled Waters: A Six-Month Longitudinal Study of the Spanish Fork River System
            • The Impact of Plant Density and Diversity on Animal Populations in a Sonoran Desert Environment
            • For Educators: Water
            • For Educators
        • Earth Science - Unit C (Grade 5)
          • Chapter 5 - Our Dynamic Earth
            • Just Add Water!
            • Plate Tectonics Puzzle
            • Shaped by Nature and Man: The Geological History of the Palisades
            • For Educators: Water
            • A Conversation with Jacques Malavieille
            • Harry Hess: One of the Discoverers of Seafloor Spreading
            • For Educators
          • Chapter 6 - Protecting Earth's Resources
            • All That Glitters (SuperScience)
            • A Comparison of the Bisbee and Morenci, Arizona, Copper Ore Deposits
            • Living with Biodiversity Series
            • Fusion Simulation
            • For Educators: Water
            • Transformation of Biosphere: Damage to Soils and Fresh Waters
            • David S. and Ruth L. Gottesman Hall of Planet Earth
        • Earth Science - Unit D (Grade 5)
          • Chapter 7 -Weather Patterns
            • What's the Angle?
            • Antarctic Hazards
            • Seasonal Cycle
            • Crazy Cold Air
            • Amazing Albedo
            • Building a Cloud Chamber (Cosmic Ray Detector)
            • Studying Tree Rings to Learn About Global Climate
            • David S. and Ruth L. Gottesman Hall of Planet Earth
          • Chapter 8 - The Universe
            • Afpectus Lunae: Does the Moon Rotate on Its Axis?
            • Crash Course? (Science World)
            • Cosmic Chemistry
            • Gravity: It's Universal
            • David S. and Ruth L. Gottesman Hall of Planet Earth
            • Telescopes: Super Views from Space
        • Physical Science - Unit E (Grade 5)
          • Chapter 9 - Comparing Kinds of Matter
            • Exploring Density
            • That's Heavy!
            • All That Glitters (SuperScience)
            • Cartesian Diver
            • The Oxidation Potential of Mineral Assemblages in Rocks From New York and Washington State
            • Sinking Water
            • Einstein
            • Gold
          • Chapter 10 - Physical and Chemical Changes
        • Physical Science - Unit F (Grade 5)
          • Chapter 11 - Using Forces
            • Crash Course? (SuperScience)
            • Gravity: It's Universal
            • Newton's Laws of Motion and Gravity Applied to Meteorites
            • Fusion Simulation
            • Weightlessness on Earth?
            • Einstein
          • Chapter 12 - Using Energy
            • Amazing Albedo
            • Building a Simple Refracting Telescope
            • Building a Spectroscope
            • Light: Its Secrets Revealed
            • The World Through a Bat's Ears
            • Detecting UV Light
            • White Light and Colored Light
            • Gathering Light
            • Einstein
      • Science A Closer Look (Grade 6)
        • Life Science - Unit A (Grade 6)
          • Chapter 1 - Classifying Living Things
            • Who Are the Plants?
            • Leaf Shape
            • Saguaro Cactus: From Life to Death
            • Science Explorations
            • Arthropod Identification
              • Arthropod Jeopardy
              • Arthropod Morphology
              • Collecting Arthropod Specimens
              • Describing and Understanding Organisms
              • How to Set up Guest Quarters for Visiting Arthropods
              • Maintaining an Arthropod Collection
              • Sorting Arthropods for Identification
            • Let's Talk with Ian Harrison about How Marine Animals Breathe
            • Bats: Twilight Zone (Science World)
            • Darwin: Voyage of Discovery (SuperScience)
            • Scaly Surprises (Science World)
            • Create a Polar Creature
            • Antarctic Adaptations
            • Find the Deep Sea Vent
            • How Deep is Deep?
          • Chapter 2 - Cells
            • 1998 Winning Essays
              • Awardee Bios
              • The Slimy, Yet Special Slug
              • Nature's Slimy Friends
              • The Feared, the Pest, the Cockroach
              • The Natural Environment of New Lisbon, New York
              • No One Sings the Praises of the Dreaded Jelly Fish
              • Poison-Dart Frogs: Nature's Touch-Me-Nots
              • The Invincible Cockroach
              • Habitat Variety and Bird Abundance
              • Bees in the Ecosystem
              • Bacteria
              • Aspen: A Keystone Species
              • Biodiversity in Arizona
            • Frogs: A Chorus of Colors
        • Life Science - Unit B (Grade 6)
          • Chapter 3 - Genetics
            • Frozen in Time (Science World)
            • Anne and Bernard Spitzer Hall of Human Origins
            • Agricultural Genetic Engineering
            • 2004 Winning Essays
              • ¡Que Vivan las Serpientes Muertas!
              • Effects of Nitrate, Phospate, and Hydrogen Ion Concentration on Synedra Ulna: Diatoms as Indicators of Water Composition
              • Life in a Vernal Pool
              • Afpectus Lunae: Does the Moon Rotate on Its Axis?
              • The Mysterious Peregrine Falcon
              • The Impact of Plant Density and Diversity on Animal Populations in a Sonoran Desert Environment
              • Morphologic Variation in the Common Periwinkle
              • Gopher Tortoises: My Endangered Fellow Floridians
              • A Comparison of the Bisbee and Morenci, Arizona, Copper Ore Deposits
              • The Mystery of a Lifeless Creek: Investigating Dissolved Oxygen and Fecal-Coliform Bacteria
              • Explaining the Divergence of the Marine Iguana Subspecies on Espa
            • Darwin: Voyage of Discovery (Science World)
            • Darwin
            • Hall of Human Origins for educators
          • Chapter 4 - Ecosystems
            • Aspen: A Keystone Species
            • Tide Pools and the Life Within Them
            • Oscawana: A Dying Lake?
            • The Impact of Plant Density and Diversity on Animal Populations in a Sonoran Desert Environment
            • Spectrum of Habitats
            • For Educators
            • Water: H2O = Life
            • For Educators: Water
            • Milstein Hall of Ocean Life
        • Earth Science - Unit C (Grade 6)
          • Chapter 5 - Changes over Time
            • Plate Tectonics Puzzle
            • Shaped by Nature and Man: The Geological History of the Palisades
            • Solve a Sedimentary Layers Puzzle
            • Arthur Holmes: Harnessing the Mechanics of Mantle Convection to the Theory of Continental Drift
            • A Conversation with Jacques Malavieille
            • Harry Hess: One of the Discoverers of Seafloor Spreading
            • Mapping Mt. Rainier
          • Chapter 6 - Conserving our Resources
            • All That Glitters (Science World)
            • Living with Biodiversity Series
            • Oscawana: A Dying Lake?
            • Transformation of the Bioshphere: Global Environmental Change
            • David S. and Ruth L. Gottesman Hall of Planet Earth
            • For Educators: Water
        • Earth Science - Unit D (Grade 6)
          • Chapter 7 - Weather and Climate
            • What's the Angle?
            • Seasonal Cycle
            • Meteorology in the Poles
            • Studying Ice Flows for Clues to Climate Change
            • Crazy Cold Air
            • Studying Tree Rings to Learn About Global Climate
            • Building a Cloud Chamber (Cosmic Ray Detector)
            • David S. and Ruth L. Gottesman Hall of Planet Earth
          • Chapter 8 - Astronomy
            • Crash Course? (Science World)
            • Journey to a Black Hole
            • Telescopes: Super Views from Space
            • The Formation of the Solar System
            • Cosmic Chemistry
            • Case Study: Gerard Kuiper and the Trans-Neptunian Comet Belt
            • Rose Center for Earth and Space
            • Dorothy and Lewis B. Cullman Hall of the Universe
            • Arthur Ross Hall of Meteorites
        • Physical Science - Unit E (Grade 6)
          • Chapter 9 - Classifying Matter
            • Water vs. Land
            • Cartesian Diver
            • Sinking Water
            • Water: H2O = Life
            • For Educators: Water
            • Einstein
            • GOLD Online Resources
          • Chapter 10 - Chemistry
            • That's Heavy!
            • An Essential Mineral
            • Einstein
            • How the Sun Works
        • Physical Science - Unit F (Grade 6)
          • Chapter 11 - Exploring Forces
            • Newton's Laws of Motion and Gravity Applied to Meteorites
            • Crash Course? (Science World)
            • Weightlessness on Earth?
            • Space Shuttle Orbiter
            • Einstein
          • Chapter 12 - Exploring Energy
            • Light: Its Secrets Revealed
            • SunScapes: Our Magnetic Star
            • Living with Biodiversity Series
    • MacMillan McGraw-Hill Science 2005
      • Science (Grade K)
        • Life Science
          • Unit A - Plants
            • Plant Morphology
            • Nature Explorations
          • Unit B - Animals
            • Nature Explorations
            • Milstein Hall of Ocean Life
            • Spectrum of Habitats
            • Frogs: A Chorus of Colors
        • Earth Science
          • Unit C - Our Earth, Our Home
            • Nature Explorations
            • Milstein Hall of Ocean Life
            • David S. and Ruth L. Gottesman Hall of Planet Earth
          • Unit D - Weather and Sky
            • Day & Night Cycles
            • Rose Center for Earth and Space
            • Dorothy and Lewis B. Cullman Hall of the Universe
        • Physical Science
          • Unit E - Exploring Matter
          • Unit F - Moving Right Along
      • Science (Grade 1)
        • Life Science
          • Unit A - Plants Are Living Things
            • Chapter 1 - All About Living Things
              • Nature Explorations
              • Make an Ecosystem Diorama
              • Hall of Biodiversity Educator's Guide Activity: Observation
              • Plant Morphology
            • Chapter 2 - A Look at Plants
              • Nature Explorations
              • Plant Morphology
          • Unit B - Animals Are Living Things
            • Chapter 3 - A Look at Animals
              • Nature Explorations
              • Hall of Biodiversity Educator's Guide Activity: Observation
              • Frogs: A Chorus of Colors
            • Chapter 4 - How Animals Meet Their Needs
              • Life in a Vernal Pool
              • Milstein Hall of Ocean Life
        • Earth Science
          • Unit C - The Sky and Weather
            • Chapter 5 - The Sky
              • Dorothy and Lewis B. Cullman Hall of the Universe
              • Rose Center for Earth and Space
              • Arthur Ross Hall of Meteorites
            • Chapter 6 - Weather and Seasons
              • Seasonal Cycle
          • Unit D - Caring for Earth
            • Chapter 7 - Earth's Resources
              • Nature Explorations
              • Milstein Hall of Ocean Life
              • David S. and Ruth L. Gottesman Hall of Planet Earth
              • A Comparison of the Bisbee and Morenci, Arizona, Copper Ore Deposits
              • Let's Talk With Melanie Stiassny About the Oceans
            • Chapter 8 - Taking Care of Earth
              • The Mystery of a Lifeless Creek: Investigating Dissolved Oxygen and Fecal-Coliform Bacteria
              • Transformation of the Bioshphere: Global Environmental Change
              • Surviving Against All Odds: Investigating the Adaptability of the Common Periwinkle
        • Physical Science
          • Unit E - Matter, Matter Everywhere
            • Chapter 9 - Describe and Measure Matter
              • Nature Explorations
            • Chapter 10 - Changes in Matter
              • The Movement of Ice Sheets
              • Sea Ice in Antarctica
              • Let's Talk with Stephanie Shipp about Glaciers, Sea Ice, and Life on Antarctica
          • Unit F - On the Move
            • Chapter 11 - Force and Motion
              • Newton's Laws of Motion and Gravity Applied to Meteorites
            • Chapter 12 - Magnets and Sound
      • Science (Grade 2)
        • Life Science
          • Unit A - Plants and Animals
            • Chapter 1 - Plants
              • Nature Explorations
            • Chapter 2 - Animals
              • Nature Explorations
              • Hall of Biodiversity Educator's Guide Activity: Observation
              • Frogs: A Chorus of Colors
          • Unit B - Homes for Plants and Animals
            • Chapter 3 - Land Habitats
              • Create a Polar Creature
              • Saguaro Cactus: From Life to Death
              • Organisms
                • Antarctic Adaptations
                • Create a Polar Creature
                • Great White South by Herbert G. Ponting
                • Microorganisms in Antarctic Seas
                • Photographing Weddell Seals from Below the Ice
                • Studying Antarctica's Marine Organisms
                • The Worst Journey in the World
              • Spectrum of Habitats
              • The Impact of Plant Density and Diversity on Animal Populations in a Sonoran Desert Environment
            • Chapter 4 - Water Habitats
              • Life in a Vernal Pool
              • Milstein Hall of Ocean Life
              • Let's Talk With Melanie Stiassny About the Oceans
              • Transformation of the Bioshphere: Global Environmental Change
              • Ocean Life Web List
        • Earth Science
          • Unit C - Changes on Earth
            • Chapter 5 - Weather and Other Earth Changes
              • Crazy Cold Air
              • Dispatch from the Deep: Shaping the Ocean Floor at the Mid-Ocean Ridges
              • David S. and Ruth L. Gottesman Hall of Planet Earth
            • Chapter 6 - Earth Yesterday and Today
          • Unit D - The Sun and Its Family
            • Chapter 7 - The Sun and Earth
              • What's the Angle?
              • Day & Night Cycles
            • Chapter 8 - Moon, Stars, and Planets
              • 3-D Model of the Big Dipper
              • Afpectus Lunae: Does the Moon Rotate on Its Axis?
              • The Formation of the Solar System
        • Physical Science
          • Unit E - Matter and Energy
            • Chapter 9 - Matter
              • Nature Explorations
              • Exploring Density
            • Chapter 10 - Energy
          • Unit F - Watch It Move
            • Chapter 11 - Forces and Machines
              • Gravity: It's Universal
              • Newton's Laws of Motion and Gravity Applied to Meteorites
            • Chapter 12 - Forces and Magnets
      • Science (Grade 3)
        • Life Science
          • Unit A - Looking at Plants and Animals
            • Chapter 1 - Plants
              • Nature Explorations
              • Make an Ecosystem Diorama
              • Plant Morphology
              • Saguaro Cactus: From Life to Death
            • Chapter 2 - Animals
              • Nature Explorations
              • Hall of Biodiversity Educator's Guide Activity: Observation
              • Metamorphosis
              • Let's Talk With Melanie Stiassny About the Oceans
              • Let's Talk with Ian Harrison about How Marine Animals Breathe
              • Milstein Hall of Ocean Life
              • The Butterfly Conservatory
              • Frogs: A Chorus of Colors
          • Unit B - Where Plants and Animals Live
            • Chapter 3 - Relationships Among Living Things
              • Spectrum of Habitats
              • The Impact of Plant Density and Diversity on Animal Populations in a Sonoran Desert Environment
            • Chapter 4 - Ecosystems in Balance
              • Water vs. Land
              • Create a Polar Creature
              • Poison-Dart Frogs: Nature's Touch-Me-Nots
              • Reefs in Crisis
              • Exploring a Woodlot's Ecosystem
        • Earth Science
          • Unit C - Our Earth
            • Chapter 5 - Earth's Resources
              • Nature Explorations
              • Fossil Halls
            • Chapter 6 - Forces Shape the Land
              • Just Add Water!
              • Dispatch from the Deep: Shaping the Ocean Floor at the Mid-Ocean Ridges
              • David S. and Ruth L. Gottesman Hall of Planet Earth
          • Unit D - Cycles on Earth and in Space
            • Chapter 7 - Earth's Weather
              • Nature Explorations
              • Amazing Albedo
              • Crazy Cold Air
              • Meteorology in the Poles
            • Chapter 8 - Earth in Space
              • Seasonal Cycle
              • Seeing the Light
              • Afpectus Lunae: Does the Moon Rotate on Its Axis?
              • Arthur Ross Hall of Meteorites
              • Dorothy and Lewis B. Cullman Hall of the Universe
        • Physical Science
          • Unit E - Forces and Motion
            • Chapter 9 - How Things Move
              • Gravity: It's Universal
            • Chapter 10 - Work and Machines
          • Unit F - Looking at Matter and Energy
            • Chapter 11 - Matter
              • Exploring Density
            • Chapter 12 - Energy
              • Gathering Light
      • Science (Grade 4)
        • Life Science
          • Unit A - The World of Living Things
            • Chapter 1 - From Cells to Ecosystems
              • Nature Explorations
              • Make an Ecosystem Diorama
              • Tree of Life
              • Fossil Halls
              • Spectrum of Habitats
              • Oscawana: A Dying Lake?
              • Saguaro Cactus: From Life to Death
            • Chapter 2 - Plants
              • Nature Explorations
              • Plant Morphology
              • The Growth Patterns of Aspens
              • Saguaro Cactus: From Life to Death
          • Unit B - Animals as Living Things
            • Chapter 3 - Describing Animals
              • Nature Explorations
              • Let's Talk with Paula Mikkelsen about Marine Invertebrates and How They Move
              • ¡Que Vivan las Serpientes Muertas!
              • Morphologic Variation in the Common Periwinkle
              • Frogs: A Chorus of Colors
            • Chapter 4 - Life Processes
              • Metamorphosis
              • Antarctic Adaptations
              • Surviving Against All Odds: Investigating the Adaptability of the Common Periwinkle
              • Frogs: A Chorus of Colors
        • Earth Science
          • Unit C - Earth and Beyond
            • Chapter 5 - Earth's History
            • Chapter 6 - Earth's Surface and Interior
              • Exploring Density
              • The Movement of Ice Sheets
            • Chapter 7 - Sun, Moon, and Planets
              • 3-D Model of the Big Dipper
              • Impact
              • The 3-D Universe
              • Afpectus Lunae: Does the Moon Rotate on Its Axis?
          • Unit D - Water and Weather
            • Chapter 8 - Earth's Water
              • Let's Talk With Melanie Stiassny About the Oceans
              • Let's Talk with Stephanie Shipp about Glaciers, Sea Ice, and Life on Antarctica
              • Oscawana: A Dying Lake?
            • Chapter 9 - Earth's Weather
              • Amazing Albedo
              • Seasonal Cycle
              • Studying Ice Flows for Clues to Climate Change
              • Studying Tree Rings to Learn About Global Climate
              • Antarctic Weather Reports
        • Physical Science
          • Unit E - Matter
            • Chapter 10 - Properties of Matter
              • Cosmic Chemistry
              • Water vs. Land
              • Exploring Density
              • Sinking Water
              • Einstein Books for Adults
            • Chapter 11 - Changes in Matter
              • Cosmic Chemistry
          • Unit F - Energy
            • Chapter 12 - Forms of Energy
              • White Light and Colored Light
              • Weightlessness on Earth?
              • Newton's Laws of Motion and Gravity Applied to Meteorites
              • Gravity: It's Universal
              • Light: Its Secrets Revealed
              • Building a Simple Refracting Telescope
            • Chapter 13 - Electricity and Magnetism
      • Science (Grade 5)
        • Life Science
          • Unit A - Characteristics of Living Things
            • Chapter 1 - Classifying Living Things
              • Nature Explorations
              • Tree of Life
            • Chapter 2 - Plant Structure and Functions
              • Nature Explorations
              • Plant Morphology
                • Parts of a Flower
                • Leaf Margins
                • Leaf Shape
                • Types of Compound Leaves
                • Leaf Type
                • Leaf Arrangement
                • The Parts of a Corn Seedling (Zea mays, Monocotyledon)
                • The Parts of a Soybean Seedling (Glycine max, Dicotyledon)
            • Chapter 3 - Plant Diversity
              • Nature Explorations
              • The Impact of Plant Density and Diversity on Animal Populations in a Sonoran Desert Environment
              • Saguaro Cactus: From Life to Death
            • Chapter 4 - Animal Diversity
              • ¡Que Vivan las Serpientes Muertas!
              • Frogs: A Chorus of Colors
          • Unit B - Living Things and Their Environments
            • Chapter 5 - Interactions of Living Things
              • How Do Humans and Plants Interact in Tidal Wetlands?
              • Milstein Hall of Ocean Life
            • Chapter 6 - Ecosystems
              • Make an Ecosystem Diorama
              • Spectrum of Habitats
              • Explaining the Divergence of the Marine Iguana Subspecies on Espa
              • Milstein Hall of Ocean Life
        • Earth Science
          • Unit C - Earth and Beyond
            • Chapter 7 - Landforms, Rocks, and Minerals
              • Dispatch from the Deep: Shaping the Ocean Floor at the Mid-Ocean Ridges
              • Zircon Chronology: Dating the Oldest Material on Earth
              • Reading the Rocks in Cold Spring Harbor, New York
              • David S. and Ruth L. Gottesman Hall of Planet Earth
            • Chapter 8 - Air, Water, and Energy
              • The Mystery of a Lifeless Creek: Investigating Dissolved Oxygen and Fecal-Coliform Bacteria
              • Milstein Hall of Ocean Life
          • Unit D - Astronomy, Weather and Climate
            • Chapter 9 - Astronomy
              • Mars: Past, Present, Future
              • Afpectus Lunae: Does the Moon Rotate on Its Axis?
              • The 3-D Universe
              • Arthur Ross Hall of Meteorites
            • Chapter 10 - Weather
              • Seasonal Cycle
              • Amazing Albedo
              • David S. and Ruth L. Gottesman Hall of Planet Earth
            • Chapter 11 - Weather Patterns and Climate
              • Crazy Cold Air
              • Studying Tree Rings to Learn About Global Climate
              • Sea Ice and Climate in Antarctica
              • Profile: Harold C. Urey
        • Physical Science
          • Unit E - Properties of Matter and Energy
            • Chapter 12 - Properties and Structure of Matter
              • Nature Explorations
              • Exploring Density
              • Arthur Ross Hall of Meteorites
            • Chapter 13 - Forms of Matter and Energy
              • Einstein Books for Adults
          • Unit F - Motion and Energy
            • Chapter 14 - Newton's Laws of Motion
              • Weightlessness on Earth?
              • Newton's Laws of Motion and Gravity Applied to Meteorites
              • Gravity: It's Universal
            • Chapter 15 - Sound Energy
            • Chapter 16 - Light Energy
              • White Light and Colored Light
              • Gathering Light
              • Building a Simple Refracting Telescope
              • Detecting UV Light
              • Building a Spectroscope
              • Light: Its Secrets Revealed
              • Case Study: John Michell And Black Holes
      • Science (Grade 6)
        • Earth Science
          • Unit C - Observing the Sky
            • Chapter 5 - The Earth-Moon System
              • Fusion Simulation
              • Telescopes: Super Views from Space
              • Building a Simple Refracting Telescope
              • Space Shuttle Orbiter
              • Afpectus Lunae: Does the Moon Rotate on Its Axis?
            • Chapter 6 - The Solar System and Beyond
              • The 3-D Universe
              • Mars: Past, Present, Future
          • Unit D - The Restless Earth
            • Chapter 7 - Earth's Moving Crust
              • Dispatch from the Deep: Shaping the Ocean Floor at the Mid-Ocean Ridges
              • When Disaster Strikes
              • Mapping Mt. Rainier
              • Harry Hess: One of the Discoverers of Seafloor Spreading
              • Forecasting Earthquakes Using Paleoseismology
            • Chapter 8 - How Earth Changes Over Time
              • My Fish-Shaped Home: A History of Changes
              • The Movement of Ice Sheets
              • James Hutton: The Founder of Modern Geology
              • Arthur Holmes: Harnessing the Mechanics of Mantle Convection to the Theory of Continental Drift
              • A Conversation with Jacques Malavieille
        • Life Science
          • Unit A - Organisms and Environments
            • Chapter 1 - The Kingdoms of Life
              • Let's Talk with Paula Mikkelsen about Marine Invertebrates and How They Move
              • Plant Morphology
              • Bacteria
              • Milstein Hall of Ocean Life
              • Frogs: A Chorus of Colors
            • Chapter 2 - Ecosystems
              • How Do Humans and Plants Interact in Tidal Wetlands?
              • Spectrum of Habitats
              • Exploring a Woodlot's Ecosystem
              • Aspen: A Keystone Species
              • Tide Pools and the Life Within Them
              • Let's Talk With Melanie Stiassny About the Oceans
              • Milstein Hall of Ocean Life
          • Unit B - Organization of Living Things
            • Chapter 3 - From Cells to Organisms
              • Metamorphosis
              • Frogs: A Chorus of Colors
            • Chapter 4 - Inheriting Traits
              • Seeing Double: An Exhibit on Cloning
              • Genetics: An Increasingly Important Field of Science
        • Physical Science
          • Unit E - Interactions of Matter and Energy
            • Chapter 9 - Properties and Changes of Matter
              • Cosmic Chemistry
              • The Abundance of Elements in the Sun
            • Chapter 10 - Heat Energy
              • Studying Ice Flows for Clues to Climate Change
              • What's the Angle?
              • How the Sun Works
            • Chapter 11 - Electricity and Magnetism
          • Unit F - Motion, Work, and Machines
            • Chapter 12 - Objects in Motion
              • Newton's Laws of Motion and Gravity Applied to Meteorites
              • Weightlessness on Earth?
              • Space Shuttle Orbiter
              • Case Study: John Michell And Black Holes
              • Gravity: It's Universal
            • Chapter 13 - Work and Machines
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