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Phase/State Changes
Vocabulary
Solids, Liquids & Gases
Adding or Removing Heat
Miscellaneous
50
A phase change from solid to liquid
melting
50
Anything that has mass and takes up space
matter
50
definite shape, definite volume
solid
50
Is energy added or removed during a phase change from solid to liquid?
added
50
The temperature at which water freezes and ice melts
0 degrees Celsius (32 degrees Fahrenheit)
50
A phase change from liquid to solid
freezing
50

Freezing

When a liquid is cooled to a solid.

50
indefinite shape, definite volume
liquid
50
Is energy added or removed during a phase change from liquid to solid?
removed
50
The temperature at which water boils and water vapor condenses
100 degrees Celsius (212 degrees Fahrenheit)
100
A phase change from gas to liquid
condensation
100
A measure of how fast the particles in a substance are moving
temperature
100
indefinite shape, indefinite volume
gas
100
Is energy added or removed during a phase change from liquid to gas?
added
100

___ ______________ affects the boiling point of liquids.

air pressure

150
A phase change from solid to gas, skipping over the liquid phase
sublimation
150

Sublimation

The change from a solid directly into a gas

150
A state of matter in which the particles vibrate in place
solid
150
Is energy added or removed during a phase change from gas to liquid?
removed
150

What happens to the mass of water when it cools and changes from a liquid to a solid.

Stays the same.

200
A phase change from gas to solid, skipping over the liquid phase
deposition
200
______ takes place at the surface of a liquid and ______ takes place throughout the entire liquid
evaporation (surface), boiling (throughout)
200

Kinetic Theory of Matter

The particles in matter are in constant motion.
200
Is energy added or removed during a phase change from solid to gas? Is energy added or removed during a phase change from gas to solid?
solid to gas (added), gas to solid (removed)
200

What happens to the temperature of a substance while it is changing state?

Stays the same