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In this engineering design challenge, learners make a bird and then control its flight with attached strings.

This warm weather activity introduces learners to the impact trees have on blocking the sun's heat and reducing temperature on the Earth's surface.

In this activity on page 24, learners perform experiments to examine whether or not trash can float, blow around, or wash away.

This activity gets learners looking at 6-sided shapes in nature, including the cells of a beehive, as well as other shapes.

In this activity, learners observe the effect of transpiration as water is moved from the ground to the atmosphere.