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Chapter 1 - Classifying Living Things

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Unit A - Diversity of Life

  • Chapter 1 - Classifying Living Things

how do scientists classify Earth's living things?

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Article

Who Are the Plants?

There are 10 divisions in the plant kingdom. The largest order, flowering plants, has 235,000 species. The smallest, gingkoes, has a single species. Learn more about the orders in the kingdom Plantae.

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Diagram

Leaf Shape

More than likely with a good guess you could detect a heart-shaped leaf from one that's oval or narrow. But do you know how to recognize a leaf that has a lobed or divided shape? Learn how. 

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Young Naturalist Awards Essay

Saguaro Cactus: From Life to Death

2003 Young Naturalist Award-winning essay - Journey to the Sonoran Desert in southern Arizona with this seventh-grader for an up-close and personal look at the saguaro cactus, which can live about 200 years and grow to be almost 80 feet tall.

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Online Resource, Activity

Science Explorations

A series of online investigations featuring scientific discoveries from Museum’s experts. Science Explorations is a collaboration between the Museum and Scholastic, the global children’s publishing, education, and media company, created to promote science literacy among students in grades 3 through 10.

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Curriculum Materials

Arthropod Identification

What makes a beetle a beetle? How does a beetle behave? And what on Earth does a beetle have in common with a lobster? These activities can help your students develop an understanding of arthropods and learn techniques for observing arthropods in the field.

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Article

Bats: Twilight Zone (Science World)

Did you know that there are more than 1,100 different bat species? Or that scientists have not yet figured out how all these species are related? Explore the challenges of studying these night fliers.

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