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In this activity, learners build a miniature wind tunnel to measure force. Learners construct the model out of Lexan plastic, a fan, and a precise digital scale.

In this activity, learners confront their perceptions of gravity in the solar system.

In this activity (on pages 10-17), learners discover how scientists study biodiversity and the health of the environment based on inspection of small areas—a process known as sampling.

In this chemistry challenge, learners discover that many chemical reactions involve heat loss or gain.

Learners build a filter from old soda bottles and dirt. They create polluted water, and pour it through their filter to clean it.