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In this activity, learners explore the different salinities of various sources of water by taste-testing.

Learners compare the weight of equal volumes of wax, water, and clay. Learners discover that since the wax weighs less than an equal volume of water, it is less dense than water and will float.

In this activity (page 2 of PDF under GPS: Glaciers Activity), learners will measure the rate at which water streams out of a leaky cup.

This hands-on experiment will provide learners with an understanding of the issues that surround environmental cleanup.

This is an activity about turbidity, or the amount of sediment suspended in water.