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In this multi-part activity learners examine non-point water pollution.

In this activity, learners discover that as the salinity of water increases, the density increases as well. Learners prove this by attempting to float fresh eggs in saltwater and freshwater.

This is a quick activity (located on page 2 of the PDF under Nasturtium Leaves Activity) about surface tension.

In this activity (located on page 6 of the PDF), learners explore the ways people access water in their homes.

This activity (located on page 3 of the PDF under GPS: Glaciers Activity) is a full inquiry investigation into the forces of gravity and air pressure.

In this activity (page 1 of the PDF under SciGirls Activity: Water Slides), learners will whip up some suds with a cup of water and a tablespoon of dish soap until the bubbles are stiff enough to star

In this hands-on activity, learners use the steps of the design process to create a hook to rescue a "space capsule" from the water.

This online simulation game explores the different consequences of water levels on the Columbia River in the Pacific Northwest.

In this design challenge activity, learners build a boat that can hold 25 pennies (or 15 one inch metal washers) for at least ten seconds before sinking.

In this activity, learners explore how engineering has developed various means to remove impurities from water.

In this outdoor activity, learners simulate an oil spill using popcorn (both oil and popcorn float on water), and estimate the spill's impact on the environment.

In this water pollution activity, learners create pond water cultures and investigate the effects of adding chemicals or natural nutrients.

This activity offers learners and their families several ways to raise their awareness together about home water.

As a group, learners consider sources of water pollution to understand where pollution starts and where it ends up.

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

Where rainwater goes after the rain stops? And why there are rivers and lakes in some parts of the land but not in others?

In this outdoor activity, learners race small boats, made of cork, balsa wood, popsicle sticks etc., to investigate the rate and direction of currents in a stream or creek.

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.

In this activity, learners will explore how a hydrometer works by building a working model and conducting experiments.

In this activity on page 7 of the PDF (Water in Our World), learners make their own water treatment systems for cleaning water.