A second feature of H₂O molecules is that they behave differently from most molecules when heated or cooled. Most materials expand when heated and contract when cooled. Water contracts when cooled until it reaches 4°C. (Water freezes at 0°C). As it continues to cool, water reverses and begins to expand.
Select the correct answer. How do H₂O molecules differ from most molecules?
a) They contract when cooled to 0°C.
b) They expand when cooled to 4°C.
c) They expand when cooled to 0°C.
