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In this activity, learners find out what happens when they cover leaves with pieces of black construction paper. This activity shows learners that plants need sunlight to survive.

Over the course of several days, learners explore the property of water that helps plants move water from roots to leaves or gives paper towels the capacity to soak up water.

This lesson introduces learners to the world of nematodes (roundworms).

In this activity, learners create a biosphere in a baggie.

In this activity, learners make a miniature greenhouse or "terrarium" to explore the greenhouse effect.

Learners place cut flowers in colored water and observe how the flowers change. The flowers absorb the water through the stem and leaves.

In this activity, learners build a model of a self-sustaining habitat (growing grass and beans from seeds).

In this activity about daily rhythms (on page 17 of the PDF), learners will explore circadian patterns in humans, animals and plants.