3. How is sound energy useful to people?
A It produces a lot of noise for people to enjoy
B. It brightens the entire world for people to see
C. It gives color to the earth for people to appreciate
D. It helps people in communicating and learning things
4. Which of the following statement is TRUE about sound?
Sound waves travel best in open spaces than in solids.
II. Sounds cannot be created in an empty space because nothing can transmit the
sound
A. I and II are TRUE
B. I and I are FALSE
C. I is FALSE, II is TRUE
D. I is TRUE, II is FALSE
Which.

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