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

In this physics activity, learners conduct two experiments to explore free-falling.

Learners are challenged to discover the relative densities of colored liquids to create a rainbow pattern in a test tube.

In this water activity, learners discover ways to move water across the water table.

In this activity exploring liquid dynamics, learners design and build a clay channel in a tray of water and then see what happens when food coloring and liquid soap are added to the mix.

In this activity on page 10 of the PDF, learners detect the amount of energy that can flow through a sodium chloride electrolyte solution with a light sensor.

In this activity about water's cohesive and adhesive properties and why water molecules are attracted to each other, learners test if objects repel or absorb water.

In this water activity, learners test which objects float and which sink. Learners discover that objects behave differently in water.

In this activity, learners make their own heat waves in an aquarium.

The Ancient Egyptians used a naturally-occurring salt from the banks of the Nile River, called natron, to mummify their dead.

In this sunny day experiment, learners measure and compare how quickly light and dark colored materials absorb heat.

In this activity (located on page 10 of the PDF), learners explore the properties of spraying and dripping water, while making art.

In this water activity, learners build boats that float and sink. First, learners listen to the book, "Who Sank the Boat" and practice making predictions throughout the story.

In this activity learners will explore how water moves on waxed paper. Learners will use science process skills such as using tools and making observations as they explore surface tension.

In this activity, learners will make fish cutouts that propel through the water with the help of surface tension.

Learners work in groups to construct bridges using stale marshmallows and toothpicks.

Learners design, build, and test models of "dragon boats" made from up to three milk cartons.

Learners build models to learn about the special cells and structures that plants use to move water from their roots up through the stems and leaves.

In this activity (located on page 3 of the PDF), learners investigate the way water moves and how we can control and direct water.

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.