Problem: OPTIONS:
- gasoline
- steel
- plastic
- cfcs
Q: Q: What man-made substance tends to break down ozone in the stratosphere? A:
Answer: cfcs
Problem: OPTIONS:
- carbon dioxide
- oxygen
- sulphur
- methane
Q: Q: The waste of cows releases a lot of which type of gas? A:
Answer: methane
Problem: OPTIONS:
- breathe
- look
- eat
- move
Q: Q: What do skeletal muscles enable the body to do? A:
Answer:
move