| A | B |
|---|
| solid | a state of matter that has a definite volume and a definite shape |
| crystalline solid | a solid that is made up of crystals |
| amorphous solid | a solid whose particles are not arranged in a regular pattern |
| melting point | the temperature at which a substance changes from a solid to a liquid |
| liquid | a state of matter that has a definite volume but no definite shape |
| viscosity | the resistance of a liquid to flowing |
| gas | a state of matter that has no definite shape or volume |
| thermal energy | the energy that the particles of a substance have due to their movement or vibration |
| melting | change in state from a solid to a liquid |
| freezing | change of state from a liquid to a solid |
| vaporization | change of state from a liquid to a gas |
| evaporation | the process that occurs when vaporization takes place only on the surface of the liquid |
| boiling | vaporization that occurs on and below the surface of a liquid |
| boiling point | the temperature at which a substance changes from a liquid to a gas |
| condensation | occurs when gas particles lose enough thermal energy to become a liquid |
| sublimation | occurs when the surface particles of a solid gain enough energy to become a gas |
