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

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

In a class demonstration, learners observe a simple water cycle model to better understand its role in pollutant transport.

This is an activity about discovering the colors and beauty of nature. Learners will spend time outdoors, matching paint chip samples, colored paper, or colors of clothing to those found in nature.

This is an activity where learners will discover what types and how many insects live in their own backyard.