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Phase Changes

Flash Cards

Altitude vertical distance, or elevation, above sea level
Boil change from a liquid to gas
Boiling point the temperature at which boiling occurs. • at sea level, the boiling point of water is 100ºC (212ºF) • Water boils at lower temperatures at higher altitudes 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 0ºC (32ºF)
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 0ºC (32ºF)
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
Created by: erinsofias