You are presented with the quiz "What does hydropower help reduce?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "using renewable resources to generate power reduces greenhouse gases" and "hydropower is a renewable resource". So, what's the best answer to the question?

OPTIONS:
- deforestation
- Greenhouse gases
- enormous damage to homes
- salinity
- energy usage
- flooding
- massive damage
- Temperature

Answer: Greenhouse gases

You are presented with the quiz "What causes sunlight to split into different colors?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "refracting sunlight causes sunlight to split into different colors" and "lenses bend, or refract, light". So, what's the best answer to the question?

OPTIONS:
- energy
- heat
- a wave
- moonlight
- paint
- Energy.
- rocks
- lenses

Answer: lenses

You are presented with the quiz "What cools the body?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "sweat wets the skin, and when it evaporates, it cools the body" and "fig 4-23 sweat contains water, salt, lactic acid, vit". So, what's the best answer to the question?

OPTIONS:
- evaporation
- Putting heat on it
- Movement of an air mass
- Starting a fire
- Evaporation of alcohol
- Evaporation of water
- vaporization
- reduced heat

Answer: Evaporation of water

You are presented with the quiz "what can change the state of matter?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "heat can change the state of matter" and "fire makes heat". So, what's the best answer to the question?

OPTIONS:
- Acids
- energy
- gravity
- volume
- density
- toxins
- fire
- motors

Answer:
fire