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

Some aquatic organisms live in open water, while some live in soil at the bottom of a body of water.

In this quick activity, learners observe how the added sugar in a can of soda affects its density and thus, its ability to float in water.

In this activity, learners conduct an experiment to explore how water flows up from a tree's roots to its leafy crown.

Learners build models of sinkholes to gain an intuitive knowledge of their physical aspects.

In this activity, learners will explore the water cycle by creating a small atmosphere.

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

In this activity (on pages 29-35), learners examine water pollution and filtration.

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

In this activity, learners create a biosphere in a baggie.

Learners explore the variables that affect the properties of ice and the places where different types of ice are found.

In this activity, learners will explore how density is affected by temperature and how that can create currents.