The diagram shows molecules in a fluid. Explain the sequence of events that happens when this fluid cools down. Be sure to focus on what happens to the molecules and to the fluid in general. Five events should be included in your answer.

Sample Response: When the fluid cools, the kinetic energy of the molecules decreases. This causes the molecules to slow down and move closer together. Since the molecules are closer together, the density of the fluid increases and the fluid sinks.

What did you include in your response? Check all that apply.

The kinetic energy of the molecules decreases. The molecules slow down. The molecules move closer together. The density of the fluid increases. The fluid sinks.