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phase changes vocab
| Term | Definition |
|---|---|
| Altitude | vertical distance, or elevation, above sea level |
| Boil | change from a liquid to a gas |
| boiling point | the temperature at which boiling occurs at sea level the bp of water is 100 deg C higher altitude=lower temp needed to boil water |
| * 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 |
| Freeze | change from a liquid to a solid. |
| Freezing point | the temperature at which freezing occurs. o At sea level, the freezing point of water is 32 °C °F). |
| * Gas | – a phase in which matter has no definite shape or volume. |
| * Gas Properties | will expand to fill any container; 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 a liquid. |
| * Melting point | the temperature at which melting occurso At sea level, the melting point of ice is 0 °C (32 °F).. |