Changes of states-The change of a substance from one physical form to another.
Solids least amount of energy, liquids more energy than solids, gases the most amount of energy.
Energy must be added or removed to have a change of state.
Melting-The change of state from a solid to a liquid. Adding energy
Melting point-The temperature at which matter changes from a solid to a liquid.
Melting is an endothermic change.
Freezing-The change of state from a liquid to a solid. Remove energy
Freezing is an exothermic change.
The temperature for freezing point and melting point is the same.
Evaporation-The change of a substance from a liquid to a gas.
Evaporation can occur at the surface of a liquid that is below its boiling point.
Boiling-The change of a liquid to a vapor, or gas, throughout the liquid.
Boiling Point-The temperature at which a liquid boils.
Changes in Atmospheric air pressure affects boiling point and freezing point temperatures.
Condensation-The change of state from a gas to a liquid.
Condensation is an exothermic change.
Sublimation-Change of state in which a solid changes directly into gas.