Question | Answer |
---|---|
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 boiling point of water is 100 degree C (212 F) Water boils at lower temperatures at higher altitude because air pressure is lower there. |
Freeze | change from a liquid to a solid |
Freezing point | the temperature at which freezing occurs. At sea level, the freezing point of water is 0 degrees C (32 F) |
Gas | 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 occurs. At sea level, the melting point of ice is 0 degrees C (32 F) |
Phase | a state of matter with certain physical properties. Solid, liquid and gas phases occur naturally on Earth. Plasma is a phase found in stars. |
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 |