On a hot day, a driver measures the air pressure inside a car tyre. During the night, the temperature falls and the pressure in the tyre goes down. No air is leaking from the tyre. Why does the pressure go down?
- AThe air molecules in the tyre move more slowly.
- BThe air molecules in the tyre stop moving.
- CThe volume of the air in the tyre decreases.
- DThe volume of the air in the tyre increases.