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Learners work in teams to investigate how scientists use physical characteristics to classify living things.

This activity helps learners understand how the angle of the Sun affects temperatures around the globe.

Using simple, inexpensive items, learners build and test submarine models.

Learners observe two model atmospheres -- one with normal atmospheric composition and another with an elevated concentration of carbon dioxide.

Ivy Rutzky, a scientific assistant at the American Museum of Natural History, introduces an activity where learners create a scientific illustration of a monarch butterfly.