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

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

The clock will slowly become quieter and will ultimately fade from view.
The clock will slowly become quieter and will ultimately fade from view.
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Answer 1

The appearance will not change, but the sound will become fainter (and eventually inaudible).

Reason: Light can travel through a vacuum so you can still see the clock, but sound needs a material medium (air) to propagate; removing the air prevents the sound waves from reaching your ear.