Quiz Questions I need to go over

1. Which contains the lowest proportion of electromagnetic waves in solar energy?
- 9% UV

2. CFCs affect global warming in what way?
- CFCs don't have any effect on the temperature of the planet and escaped CFCs destroy the ozone layer which protects our planet from the sun's UV rays.

3. Unlike electromagnetic waves, sound waves can travel through a vacuum.
- False

4. Plant photosynthesis
- takes away CO2 from the atmosphere

5. Destroying rainforest
- leads to more CO2 in the atmosphere

6. Driving cars with internal combustion gasoline engines
- leads to more CO2 in the atmosphere

7. Plant photosynthesis depends on which source for its energy?
- Visible light from the sun

8. Every day we create how much garbage?
- 4 to 7 pounds per day.

9. In the Carbon Cycle, which steps do NOT happen?
- Burning fossil fuels releases O2 and decreases CO2 in the atmosphere.

10. How many types of alloy did you make in the Alloy lab?
- Two

11. Can sound travel through a vacuum?
- No, only electromagnetic waves can

12. The alloy in the metal brass has a different hardness than that of copper?
- True.