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

Learners compare the weight of equal volumes of wax, water, and clay. Learners discover that since the wax weighs less than an equal volume of water, it is less dense than water and will float.

In this introductory demonstration and activity, learners are introduced to the concept of density as they explore a rock and a wooden block in water.

Learners will see that changing the shape of an object, like a clay ball, that is more dense than water, can affect whether the object will sink or float.

In this hands-on activity, learners will construct a scuba diver that can float in order to explore how sea creatures stay neutrally buoyant in the ocean and to see what kinds of forces might be influ

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 an investigation called "Shape It!" learners craft tiny boats out of clay, set them afloat on water and then add weight loads to them, in order to explore: how objects stay afloat in water; what th

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

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

Learners observe a flask with a balloon attached over the mouth and inverted inside the flask.

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

In this activity, learners will discover why there are holes in bread.

In this activity (page 1 of the PDF under SciGirls Activity: Bogs), learners will test cups full of potting soil, sand, and sphagnum moss to see which earth material is able to soak up the most water.

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 explore water adhesion and learn about why water molecules are more strongly attracted to some substances than others.

In this investigation, learners explore the force known as buoyancy by placing various objects into water and observing how they behave (for example, which sink more quickly, which float, how much wat

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

Water on Earth is in lakes, the ocean, rivers, underground, and frozen glaciers.

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

Water sticks to all kinds of things in nature — flowers, leaves, spider webs - and doesn't stick to others, such as a duck's back.