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In this activity, learners act as water molecules and travel through parts of the water cycle to discover that it is more complex than just water moving from the ground to the atmosphere.

Learners create hard water by mixing Epsom salt and water. Then they compare what happens when soap solution is mixed with hard water and regular water.

In this physics activity (page 10 of the PDF), learners will explore how energy from moving water can be used.

Learners add different liquids (water, salt water, alcohol, and detergent solution) to water and observe the different ways the different liquids combine with water.

In this activity, learners investigate how different materials repel or absorb water. Learners use spray bottles to explore how everyday items like sponges, cardboard, feathers, etc.

In this activity, learners use the design thinking process to design and build their own aqueduct, or water bridge.

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

In this activity, learners build water-propelled engines from soft drink cans.

This three-part activity consists of an activity that groups of learners develop themselves, a given procedure, and an optional demonstration.

Design a vessel that tests the limits of wind power given a set of off the shelf and recycled materials.

Learners design their own experiment to determine which M&M color dissolves the fastest in water.

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

No glue is needed for learners of any age to become marshmallow architects or engineers.

On an airplane trip, learners have an opportunity to investigate the properties of air pressure at different altitudes.

In this activity, learners explore the process of condensation.

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.

Learners design their own experiment to investigate whether the temperature of the surrounding water affects the rate at which the colored coating dissolves from an M&M.

In this activity, learners investigate and compare the rate of drying in different conditions.

Learners observe and conduct experiments demonstrating the different properties of hot and cold materials.

In this activity, learners observe how salinity affects the freezing point of water by making and enjoying ice cream.