States of Matter
Solid, Liquid, Gas
Which of the states of matter are involved in the process of melting?
solid and liquid
Which state of matter has the most freedom of movement?
gas
temperature at which a substance changes from a solid to a liquid
melting point
As water vapor rises, it cools and condenses to form...
clouds
Describe a solid. Use your vocabulary.
Molecules are grouped together and have very little motion.
liquid to gas
evaporation
Which state of matter has the least freedom of movement?
Solid
temperature at which a substance changes from a liquid to a gas
boiling point
When it’s cold enough, water vapor not only condenses but also freezes, forming tiny ice crystals.
Snow
Describe a liquid. Use the vocabulary.
Molecules remain close together but can freely move around and past one another.
By which process does a gas become a liquid?
condensation
Describe what happens to the molecules in a solid when energy is added.
The molecules can move more freely against each other.
transferring energy by direct contact
conduction
A cloud that is close to the ground
Describe a gas. Use the vocabulary.
Molecules spread far apart, constantly moving.
What is it called when energy is added to a gas and it skips the liquid phase?
Sublimation
Describe what happens to the molecules in a gas when energy is removed.
measure of the kinetic energy of the atoms of a substance
temperature
When water vapor close to the ground condenses
dew
What is needed for a phase change to occur?
energy
What is the phase change that sees a gas turn into a solid?
deposition
Does removing energy increase or decrease the rate of change in matter?
Decrease
amount of kinetic energy that is transferred from a substance of higher temperature to one of lower temperature
heat
Water vapor in the air changes directly to a solid
frost