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

Water treatment on a large scale enables the supply of clean drinking water to communities.

In this activity, learners receive a labeled plastic film canister containing a material representing a pollutant (i.e. pencil shavings = a beaver's wood chips).

Learners take on the role of environmental engineers as they design water filters.

In this creative roleplay activity, learners will explore the various processes of the water cycle using movement, sound, and props to aid in comprehension.

In this ecology activity (page 8 of the PDF), learners explore how to filter contaminated water using a variety of materials.

In this investigation learners explore the differences between, and interdependence of, living and nonliving elements in a water ecosystem.

In this outdoor, sunny day activity, learners experiment with paper leaf models to discover how some desert plants conserve water.

In this outdoor activity, learners compare the moisture released from different kinds of leaves and from different parts of the same leaf, by observing the color change of cobalt chloride paper.

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.

When it rains, water can collect on top of and seep into the ground. Water can also run downhill, carrying soil and pollution with it.

In this activity, learners use plastic water bottles, wood, and water to build an inexpensive and portable tool to demonstrate one atmosphere of pressure at sea level.

In this activity about the circulatory system and space travel (on page 38 of the PDF), learners use water balloons to simulate the effects of gravity and microgravity on fluid distribution in the bod

In this outdoor activity/field trip, learners locate and study plants and animals in several freshwater pond habitats.

Learners create a model of a wetland to observe how it absorbs and filters water from the environment.

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 construct a coastal landmass from sand and add features such as tidal creeks and barrier islands.

In this wintertime outdoor activity, learners role play wolves tracking their prey by following scented trails.

In this activity, learners model, on a human-sized board game, how changes in water temperature may affect fish distributions and, ultimately, fisheries.

In this outdoor activity, learners use a mapping technique to become oriented to the major features of an outdoor site.