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In this activity on page 27, learners perform an experiment to learn about how different types of marine debris degrade and how weather and sunlight affect the rate of degradation.

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

Learners build particulate matter collectors--devices that collect samples of visible particulates present in polluted air.

In this Bob the Builder(TM)-themed activity, learners go on a nature walk outside and describe what they observe using their senses.