Matter that is vibrating is producing ___.
A B C D
gas light sound shadows
Question: Matter that is vibrating is producing ___.
(A) gas
(B) light
(C) sound
(D) shadows

Answer: (C) sound
Answer: (D) shadows
Question: Matter that is vibrating is producing ___.
(A) gas
(B) light
(C) sound
(D) shadows
Answer: (C) sound