A B 1 Drop a stone in water. e a The water boils. 2 Pour oil on water.h 3 Heat water to 100°C. Mix blue and yellow. 6 Throw a ball into the ir 6 Heat chocolate. 7 Freeze wer. 8 P. 1ood in the fridge. b The ball falls to the ground. c The chocolate melts. d The food stays fresh longer. e The stone sinks. f The water becomes ice. g You get green. h It floats.