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A Little Drop of Water: Cohesion
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Learners explore water's property of cohesion through two investigations.

Best Bubbles
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In this activity, learners experiment with creating various types of bubble solutions and testing which ingredients form longer-lasting bubbles.

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

Bubble Tray
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In this activity, learners use simple materials to create giant bubbles.

Floating Paper Clip
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In this activity, challenge learners to float a paper clip in a cup of water. Learners discover that a paper clip will sink in a cup of water, except when it is placed on a piece of paper towel.

Cat's Meow
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In this chemistry activity, learners are asked to form a hypothesis about the behavior of milk as household detergents act upon it.

Gravity Fail
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In this activity, learners try pouring water out of a regular cup and a miniature cup. It’s harder than it sounds! Learners discover that different forces dominate at different size scales.

Waterproof Hanky
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In this physics demonstration, learners will be surprised when a handkerchief holds water in an upside-down glass.
Pepper Scatter
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In this activity, learners explore the forces at work in water. Learners experiment to find out what happens to pepper in water when they touch it with bar soap and liquid detergent.

The Great Plankton Race
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In this activity, learners are challenged to design a planktonic organism that will neither float like a cork nor sink like a stone.

Water: Clearly Unique!
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In this activity on page 4 of the PDF (Water in Our World), learners conduct some quick and easy tests to determine the differences between water and other liquids that look very similar to water.

Does Size Make a Difference?
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In this activity on page 15 of the PDF, discover how materials and physical forces behave differently at the nanoscale.

Uplifting Force: Buoyancy & Density
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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

Inner Space
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In this activity, learners discover that there is space between molecules even in a cup "full" of water. They first fill a cup with marbles, and then add sand to fill the gaps between the marbles.

Below the Surface: Surface Tension II
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In this activity learners explore surface tension. Why are certain objects able to float on the surface of water and how do detergents break the surface tension of water?

Penny Drop
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In this quick activity about the properties of water (page 1 of PDF under SciGirls Activity: Malformed Frogs), learners will use an eyedropper to slowly place one drop of water at a time onto a penny,
When is a Glass of Water Really Full?
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In this activity, learners see how many coins they can add to a full glass of water before the water overflows.

What's So Special about Water: Surface Tension
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In this three-part activity, learners play a game and conduct two simple experiments to explore water and surface tension. Learners will have fun discovering how water "sticks" together.

Shrinking Cups
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This is a quick activity (on page 2 of the PDF under Gecko Feet Activity) about the forces of gravity and surface tension and how their behavior is influenced by size.

Drops on a Penny
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In this activity, challenge learners to predict and investigate how many water drops they can fit on one penny.