You haven't completed the exercise.

Review unit: Part 2 (Exercise 1.1)


1. Water molecules are more strongly attracted to each other than to different substances.


2. Water can absorb large amounts of heat without melting or bursting into flames.


3. Water becomes more dense when it is frozen.


4. If we didn’t have ice floes, the ice would build up and gradually cover the Earth in a glacier-like mass.