How does water turn to ice?
Adding air The bending of a ray of light Warm air moving into cold air Increasing heat energy It used to be covered by water evaporation Adding salt Reducing heat energy
A B C D E F G H
Solid ice is melted into liquid water.
Reducing heat energy turns water into ice. 
How does water turn to ice? (A) Adding air (B) The bending of a ray of light (C) Warm air moving into cold air (D) Increasing heat energy (E) It used to be covered by water (F) evaporation (G) Adding salt (H) Reducing heat energy