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

The World's Water
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Water on Earth is in lakes, the ocean, rivers, underground, and frozen glaciers.

Pop Can "Hero Engine"
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In this activity, learners build water-propelled engines from soft drink cans.

Stick to It: Adhesion II
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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.

Breaking the Tension: Surface Tension 1
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Learners explore how the attractive forces between water molecules create surface tension and allow certain objects to float on the surface of water.

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

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

Watercraft
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In this design challenge activity, learners build a boat that can hold 25 pennies (or 15 one inch metal washers) for at least ten seconds before sinking.

Rescue Mission
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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.
Big and Little Cups
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In this indoor or outdoor water activity, learners pour water from small cups to large cups and containers. In doing so, they discover water takes the shape of its container.