On a hot day, a driver measures the air pressure inside a car tyre. Later, when the temperature falls at night, the tyre’s air pressure also falls. The tyre has no air leaks. Why does the pressure fall?
- 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.