1. A student left a sealed jar of water outside her home. Water can be a solid, liquid, or gas. When she
put it outside, the water was a solid. Twelve hours later, the water had changed phase and was a
liquid. What happened to the water molecules?
Before the student left, the molecules were moving in place. After the molecules were
moving around each other.
Before the student left, the molecules were moving around each other. After the molecules
were moving away from each other.
Before the student left, the molecules were moving around each other. After the molecules
were moving in place.
Before the student left, the molecules were moving away from each other. After the
molecules were moving around each other.