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Globe at Night
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In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database.

Lungometer
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In this environmental health activity, learners investigate their own vital lung capacities.

Heart and Lungs
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In this environmental health activity, learners investigate their breathing and pulse rates, and learn how these measurements are affected by physical activity.

Seedy Travelers
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In this activity (on pages 18-28), learners explore how the shape of seeds affects how they are dispersed by wind, birds, ocean currents and other means.