Question

A ringing alarm clock is put under a glass jar. The air is slowly removed from the space around it. What will happen as the air is removed? (1 point)
Responses

The appearance of the clock and the sound of the clock will not change.
The appearance of the clock and the sound of the clock will not change.

The clock will slowly become quieter and will ultimately fade from view.
The clock will slowly become quieter and will ultimately fade from view.

The appearance of the clock will not change, but its sound will become fainter.
The appearance of the clock will not change, but its sound will become fainter.

The clock will slowly become less visible, until you can only hear it.

Answer 1

The appearance of the clock will not change, but its sound will become fainter.

As air is removed from around the clock, the sound waves produced by the ringing clock will have fewer air molecules to travel through, which will cause the sound to become quieter. However, the visual appearance of the clock itself will remain unchanged.