Term | Definition |
Altitude | Vertical distance, or elevation, above sea level. |
Boil | Change from liquid to a gas. |
Boiling Point | The temperature at which boiling occurs. |
Freeze | Change from a liquid to solid. |
Freezing Point | The temperature at which freezing occurs. |
Gas | A phase in which matter has no definite shape or volume. |
Gas Properties | Will expand to fill any containe; can be compressed; molecules relatively far apart and move freely. |
Water Vapor | Water in the gas phase. |
Liquid | A phase in which matter has definite volume but no definite shape. |
Liquid Properties | Will take the shape of a container but cannot expand or be compressed; molecules in a liquid move randomly but stay close to one another. |
Melt | Change from a solid to liquid. |
Melting Point | The temperature at which melting occurs. |
Phase | A state of matter with certain physical properties. |
Solid | A phase in which matter has a definite shape and a definite volume. |
Solid Properties | Will retain the same shape and volume in any container; atoms are held in a rigid structure and cannot move freely. |
Ice | Water in the solid phase. |
Thermal Energy | Energy in the form of heat. |
Vaporization | Rapid change from liquid to gas. |
Condensation | Change from gas to liquid. |
Sublimation | Change from solid to gas. |
Evaporation | Slow change from liquid to gas. |
Deposition | Change from gas to solid. |