vocabulary:phase changes
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| altitude |
vertical distance, or elevation, above sea level
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| boil | change from a liquid to a gas
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| Boiling Point | the temperature at which boiling occurs.
At sea level, the boiling point of water is 100 degree C (212 F)
Water boils at lower temperatures at higher altitude because air pressure is lower there.
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| Freeze | change from a liquid to a solid
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| Freezing point | the temperature at which freezing occurs.
At sea level, the freezing point of water is 0 degrees C (32 F)
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| Gas | gas a phase in which matter has no definite shape or volume
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| Gas Properties | will expand to fill any container ; can be compressed; molecules relatively far apart and move freely.
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| Water Vapor | water in the gas phase
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| Liquid | a phase in which matter has definite volume but no definite shape
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| Liquid properties | will take the shape of a container but cannot expand or be compressed; molecules in a liquid move randomly but stay close to one another.
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| melt |
change from a solid to a liquid
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| Melting point |
the temperature at which melting occurs.
At sea level, the melting point of ice is 0 degrees C (32 F)
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| Phase | a state of matter with certain physical properties.
Solid, liquid and gas phases occur naturally on Earth.
Plasma is a phase found in stars.
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| Solid | a phase in which matter has a definite shape and a definite volume.
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| Solid properties | will retain the same shape and volume in any container; atoms are held in a rigid structure and cannot move freely.
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| Ice | water in the solid phase
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| Thermal Energy | Energy in the form of heat
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| Vaporization | rapid change from liquid to gas
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| Condensation | change from gas to liquid
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| Sublimation | change from solid to gas
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| Evaporation | slow change from liquid to gas
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| Deposition | change from gas to solid
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