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In this design challenge, leaners attempt to build a strong structure out of LEGO® bricks that can withstand a 4-foot drop.

This activity models the necessary balance of creating power and cleaning up its associated waste. Learners participate in a game where they attempt to move forward toward a goal.

In this activity (on pages 12-15), learners make a crater model and test the effects of weather (rain) on its surface.

Learners make their own paper. They start by shredding old newspaper, clean toilet paper, and clean paper towels.

Make impact craters with marbles (or rocks or washers) in a container of flour. Find out what you can learn about your "comets" by the craters they make.