A condensation. b precipitation. 1 When the sun shines on the sea, warm air rises and forms water vapour. This is called 2 The water vapour in the air changes into small drops of water. This is called 3 The small drops of water come together and form clouds. This is called 4 When the clouds are big and heavy, the drops of water fall as rain or snow.This is called c evaporation d cloud formation.