Phase Changes
What is the phase change from a solid to a liquid called?
Melting
Density is the ____ of a substance per unit of volume.
Mass
When matter is in its solid state, the particle motion is slower or faster than in the other states of matter?
slower
In which state of matter do particles have the least energy?
Solid
What is the phase change from a liquid to a solid?
Freezing
Does density increase or decrease when heat is added to a substance?
Decrease
When matter is in its liquid state, is there more or less particle motion than in a gas?
less
What is the phase change from a liquid to a gas?
Evaporation
Does density increase or decrease when heat is removed from a substance?
Increase
When matter is in its gas state is there less or more particle motion than in a liquid?
more
What is the phase change from a solid directly to a gas?
Sublimation
How is the state of matter of a substance determined?
By the amount of energy of the particles of the substance.
True or false: A phase change is the change of matter from one state to another.
True
What is the phase change from a gas to a liquid?
Condensation
The more heat added to a substance, the more the particles ____.
Spread out
What is the phase change from a gas directly to a solid?
Deposition