Soap bubbles, balloons and marshmallows expand when placed in a vacuum. 


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The Molecular Motion Demonstrator (MMD) shows how kinetic energy affects how atoms arrange themselves.


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Read more: How Atoms Act in Solids and Liquids

The Molecular Motion Demonstrator (MMD) shows how the random motion of molecules in a gas causes two separate gases to diffuse.


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Read more: A Simple Demonstration of Diffusion

Collisions can create enough energy to burn a hole in paper.


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Read more: Kinetic Energy into Thermal Energy

The MMD is used to illustrate some of the assumptions about gaseous molecules.


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Read more: Motion of Molecules in a Gas