Fill in the Blanks THE CHANGING STATES OF WATER. Online version Science. Primary School, grade 3 by Gonzalo Barral 1 one changes heats freezes Freezing Melting Condensation cools Evaporation A change of state occurs when water from state to another . This occurs when water or up . ? occurs when ice is heated and it turns into water . ? occurs when water cools and turns into ice . Water at 0 ºC . This is its freezing point . ? occurs when water heats up and turns into water vapour . ? occurs when water vapour cools and turns into liquid water .