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

By building a simple watershed with paper and markers and then using a spray bottle to simulate precipitation, learners will understand how pollution accumulates in our water sources, especially from

In this demonstration, learners observe vinegar and baking soda reacting to form carbon dioxide (CO2) gas.

Learners discover that their breath contains carbon dioxide, one of the pollutants found in car exhaust.