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In this environmental science activity (page 3 of the PDF), leaners will identify and explain the causes of erosion.

Over $20 per group Ages 8 - 11 1 to 7 days
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In this activity (located on page 6 of the PDF), learners explore the ways people access water in their homes.

1 cent - $1 per student Ages 6 - 11 10 to 30 minutes
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In this outdoor, sunny day activity, learners experiment with paper leaf models to discover how some desert plants conserve water.

$10 - $20 per group Ages 8 - 18 45 to 60 minutes
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In this quick activity (located on page 2 of the PDF under GPS Wetlands Activity), learners will model how wetlands act as natural filters for the environment.

$5 - $10 per group Ages 8 - 14 10 to 30 minutes
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In this activity, learners consider the water features they might enjoy at a community park--a pond, brook, water playground (or "sprayground"), or pool--and what happens to the water over time.

Over $20 per group Ages 4 - 14 10 to 30 minutes
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In this activity, learners will explore how a hydrometer works by building a working model and conducting experiments.

1 cent - $1 per group Ages 8 - 18 45 to 60 minutes