(Q).
Q: What man-made substance tends to break down ozone in the stratosphere? Choices: - gasoline - steel - plastic - cfcs A:
(A).
cfcs

(Q).
Q: The waste of cows releases a lot of which type of gas? Choices: - carbon dioxide - oxygen - sulphur - methane A:
(A).
methane

(Q).
Q: What do skeletal muscles enable the body to do? Choices: - breathe - look - eat - move A:
(A).
move