Why does tapping a fork against a water glass produce a sound?
A B C D
The air expands. The fork releases electrons. The particles in the objects vibrate. The water in the glass forms ripples.
Question: Why does tapping a fork against a water glass produce a sound?
(A) The air expands.
(B) The fork releases electrons.
(C) The particles in the objects vibrate.
(D) The water in the glass forms ripples.

Answer: (C) The particles in the objects vibrate.
Answer: (D) The water in the glass forms ripples.
Question: Why does tapping a fork against a water glass produce a sound?
(A) The air expands.
(B) The fork releases electrons.
(C) The particles in the objects vibrate.
(D) The water in the glass forms ripples.
Answer: (C) The particles in the objects vibrate.