Terminology

States of matter
Term Explanation
melting A process where solid matter transforms into liquid matter as its temperature increases. E.g. ice water.
evaporation A process where liquid matter transforms into gaseous matter as its temperature increases. E.g. water vapor.
condensation A process where gaseous matter transforms into liquid matter as its temperature decreases. E.g. vapor → water. 
solidification A process where liquid matter transforms into solid matter as its temperature decreases. E.g. water → ice.