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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)
100
A phase change from liquid to solid
freezing
100

Freezing

When a liquid is cooled to a solid.

100
indefinite shape, definite volume
liquid
100
Is energy added or removed during a phase change from liquid to solid?
removed
100
The temperature at which water boils and water vapor condenses
100 degrees Celsius (212 degrees Fahrenheit)
150
A phase change from gas to liquid
condensation
150
A measure of how fast the particles in a substance are moving
temperature
150
indefinite shape, indefinite volume
gas
150
Is energy added or removed during a phase change from liquid to gas?
added
150

___ ______________ affects the boiling point of liquids.

air pressure

200
A phase change from solid to gas, skipping over the liquid phase
sublimation
200

Sublimation

The change from a solid directly into a gas

200
A state of matter in which the particles vibrate in place
solid
200
Is energy added or removed during a phase change from gas to liquid?
removed
200

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

Stays the same.

250
A phase change from gas to solid, skipping over the liquid phase
deposition
250
______ takes place at the surface of a liquid and ______ takes place throughout the entire liquid
evaporation (surface), boiling (throughout)
250

Kinetic Theory of Matter

The particles in matter are in constant motion.
250
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)
250

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

Stays the same