A twig is just a twig—or is it? You can identify a plant, tree, or shrub just by closely observing one small part of it. After this activity, you'll never again dismiss a twig.
Test your classification skills with this leafy challenge. Examine drawings of 12 oak leaves, and see if you can determine the common and scientific name for each one of the dozen.
Can you name the mystery arthropod named for its hundred-some legs? More important, do you know what physical and behavioral characteristics it shares with a shrimp or honeybee?
Earth's climate is changing, and according to scientists today's kids will bear the brunt of the potentially damaging affects of a warmer world. Find out how scientists are preparing now for the potential negative consequences.
"Greenhouse effect" and "global warming" are becoming household phrases but how, exactly, are they linked? Explore the interconnections and consequences of climate change.
What's the size of your desk in relation to your teacher's? Or to the chalkboard at the front of the room? Hone your mapping skills with this classroom activity.
This discussion explores how artificial boundaries can decrease mate choice, with a specific example of highways limiting mate choice for bighorn sheep.
Educator Guide, Lesson Plan
This worksheet prepares students to compare this historic food web of the Chesapeake Bay to the food web of the present day.
Some scientists believe the fate of humankind was changed when humans first began to tame the wild horse. Learn more about how horses have shaped our world.
Focus on the best books about astronomy, astrophysics, light, telescopes, digital imaging, and the 3-D universe with this list of recommended titles, suitable for older students and adults.