Question: Q: When two skateboarders push against each other what happens? A:
OPTIONS:
- they stick together
- they rise
- they magnetize
- they move apart
Answer: they move apart

Question: Q: Hydroelectric power harnesses the energy of what? A:
OPTIONS:
- weather
- heat
- air
- water
Answer: water

Question: Q: When does coal release most of its energy? A:
OPTIONS:
- when forming
- when compressed
- when falling
- when burning
Answer:
when burning