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Salt 'n Lighter
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In this activity, learners discover that as the salinity of water increases, the density increases as well. Learners prove this by attempting to float fresh eggs in saltwater and freshwater.
Defining Density
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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.
Diet Light
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In this quick activity, learners observe how the added sugar in a can of soda affects its density and thus, its ability to float in water.
Cooking with Chemistry
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In this activity, learners experiment with different variables in making hollandaise sauce to achieve the correct texture and consistency.
How Can Gravity Make Something Go Up?
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In this activity, learners use cheap, thin plastic garbage bags to quickly build a solar hot air balloon. In doing so, learners will explore why hot air rises.
Electric Paddle Boat
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In this activity, learners build an electric two-paddle boat using paint paddles, plastic knives, and empty water bottles.
Linear Functions: Mystery Liquids
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In this math lesson, learners analyze the density of liquids in order to explore linear functions.
Submarine: Soda Cup Lander
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In this activity (on page 2), learners create a submarine using a plastic cup. This is a fun way to learn about buoyancy and density.
Oily Ice
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In this activity, learners experiment with the density of ice, water, and oil. Learners will discover that the density of a liquid determines whether it will float above or sink below another liquid.
Hot Air Balloon
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In this activity, learners build a hot air balloon using just a few sheets of tissue paper and a hair dryer.
Density Rainbow and the Great Viscosity Race
Learners conduct two activities to investigate two properties of liquids: density and viscosity. In a clear container, learners stack 7 different liquids which will layer according to their density.
Toasty Wind
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In this quick activity, learners use a toaster to investigate the source for the Earth's wind. Learners hold a pinwheel above a toaster to discover that rising heat causes wind.
Paddle Boat
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In this activity, learners build an old-fashioned paddle boat out of simple materials.
Speedboat
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In this activity, learners build a speedboat using paint paddles, a propeller, and film canister. Learners attach a simple circuit and motor to the boat to power the propellers.
What Causes Pressure?
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In this kinesthetic activity that demonstrates pressure, learners act as air molecules in a "container" as defined by a rope.
A Pressing Engagement
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In this quick and easy activity and/or demonstration, learners illustrate the effect of the weight of air over our heads.
Gassy Lava Lamp
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In this activity, learners use oil, water, food coloring and antacid tablets to create a bubbling lava lamp. Use this activity to introduce concepts related to density, hydrophobicity vs.
Energetic Water
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In this activity, learners explore how hot and cold water move. Learners observe that temperature and density affect how liquids rise and fall.
Melting Ice
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In this activity, learners explore density, convection, stratification, and, by inference, the melting of icebergs. Learners make hypotheses, test their hypotheses, and explain their observations.
Floating Head Cup
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In this activity, learners watch a figure "magically" float up through the air.