The three states of matter are solids, liquids, and gases; review the Kinetic Theory and diffusion. This video will explore changes in states of matter.
Solids are atoms or molecules held in fixed positions. Learn about the basic structure of atoms and electrostatic force. Heating a solid makes molecules vibrate faster and move apart; cooling does the opposite. See examples of melting and freezing.
Gases consist of fast moving atoms or molecules that bounce around and collide; gases can be compressed. Boiling is the process of a liquid becoming a gas. Learn about boiling points, evaporation, and condensation.
Dry ice is solid carbon dioxide. Carbon dioxide gas goes directly to a solid when cooled and directly to a gas when heated; compare dry ice to water ice. Molecules can change size when heated or cooled.
Credits: Shedding Light on Heat: Episode 2—Changes of State
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In this program, we look at the differences between solids, liquids, and gases, and at why things change state when they absorb or lose heat energy. We also look at the strange example of carbon dioxide, which doesn’t follow the same rules that that most other substances do!
Length: 20 minutes
Copyright date: ©2019
Prices include public performance rights.
Not available to Home Video customers.
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