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Separation Anxiety
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In this activity, learners discover the primary physical properties used to separate pure substances from mixtures.
Comparing the Density of an Object to the Density of Water
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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.
Atoms and Matter (3-6)
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In this activity, learners build models of atoms and molecules, then consider their role in different phases of matter, density, and mixtures and solutions.
Changing the Density of an Object: Changing Shape
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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.
Exploring How Liquids Behave
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Learners apply their knowledge from a previous study to identify different liquids--water, corn syrup, and vegetable oil.
Comparing the Density of Different Liquids
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Learners carefully pour vegetable oil, water, and corn syrup in any order into a cup and discover that regardless of the order they are poured, the liquids arrange themselves in layers the same way.
Using Color to See How Liquids Combine
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Learners add different liquids (water, salt water, alcohol, and detergent solution) to water and observe the different ways the different liquids combine with water.
Oil Spill Cleanup
This hands-on experiment will provide learners with an understanding of the issues that surround environmental cleanup.
Changing the Density of a Liquid: Heating and Cooling
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Learners investigate how the temperature of water affects its density.
Changing the Density of an Object: Adding Material
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Learners see that a can of regular cola sinks while a can of diet cola floats. As a demonstration, bubble wrap is taped to the can of regular cola to make it float.
Sky Floater Challenge
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In this design challenge activity, learners make a balloon hover at eye level for five seconds, and then make it move by creating air currents.