1. Light travels at a constant speed of approximately 300,000,000 meters per second everywhere on Earth. True False

2. Fire a bullet horizontally from a gun. At the same time, drop an identical bullet from your hand. If both bullets start at the same height, and we ignore wind effects, then both bullets should hit the ground at the same time. True False

3. The sky is blue because our atmosphere reflects blue light best. True False

4. It is warmer during the summer in North America because the Earth is closer to the Sun. True False

5. In spite of its harmful qualities, exposure to sunlight is also good for you because it helps you produce vitamin D. True False

6. Most of the oxygen in our atmosphere comes from photosynthesis carried on by plants living in the rainforests. True False

7. Dogs can't see colors. True False

8. Due to changes in the boiling point of water, it takes longer to cook pasta on the tops of high mountains than it does at sea level. True False

9. The coriolis effect can be seen in toilet bowls when you flush. Thus, two identical toilet bowls should swirl in opposite directions when they are placed on opposite sides of the equator. True False

10. Helium was first discovered on the Sun. True False