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Density: Make a golf ball float!
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In this activity (on page 2 of the PDF), the learner places a golf ball between salt water and colored fresh water. The golf ball is not as dense as the saltwater.

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.

Snowstorm in a Jar
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In this activity, learners will experiment with density and chemical reactions to create a flurry activity.

The Amazing Water Trick
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Using two baby food jars, food coloring, and an index card, you'll 'marry' the jars to see how hot water and cold water mix.

Dancing Spaghetti
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In this chemistry activity, learners use spaghetti to explore density and chemical reactions.

Diving Submarine
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Learners use a commercially available toy to experiment with density. They fill a chamber in the toy submarine with baking powder and release it into a tank of water.

Klutz-Proof Density Column
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Making liquids of different densities to perfectly lay on top of each other can be a frustrating exercise. The Exploratorium created this activity as a fool proof way of making a density column.

Making Waves
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Investigate the interaction of liquids of different densities and experiment with wave patterns with this hands-on activity.

Exploring the Universe: Objects in Motion
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"Exploring the Universe: Objects in Motion" encourages participants to explore the complex but predictable ways objects in the universe interact with each other.

Color Splash
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In this activity, learners mix water, cooking oil, and liquid food coloring to create beautiful colored designs in a cup. Use this activity to explore liquid density and solubility.

Layered Liquids: Chemistry You Can Drink
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In this chemistry activity (on page 2 of the PDF), learners make a layered drink with liquids of different densities.

That Sinking Feeling
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In this quick activity, learners observe how salinity and temperature affect the density of water, to better understand the Great Ocean Conveyor.

Daffy Density
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In this chemistry activity, learners explore density by using four solids and 6 liquids to create colorful, layered rows.

Sink or Swim?
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Learners observe a tank of water containing cans of diet and regular sodas. The diet sodas float and the regular sodas sink. All the cans contain the same amount of liquid and the same amount of air.

Conversation Piece
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Focus sound through a balloon! In this Exploratorium activity, you'll use dry ice to create a balloon that's a sound lens.

Condiment Diver
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In this hands-on activity, learners make the world's simplest Cartesian diver, using only a plastic bottle, some water, and a condiment packet.

Cauldron Bubbles
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In this activity, learners mix up a bubbly brew and examine density. Learners explore how they can make different materials fall and rise in water using oil, water, and salt.

Erupting Fizz
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This is a highly visual demonstration that illustrates both the effects of density and chemical reactions.

Density Rainbows
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In this activity, learners explore the concept of density by pouring 5 different liquids into a jar. Food coloring is added if needed to give each liquid a distinct color.