1. What are the Kirkwood gaps, and what causes them? 2. What are the Trojan asteroids, and where are they located? 3. Describe the three main classifications of meteorites. How do astronomers believe...

1. What are the Kirkwood gaps, and what causes them?

2. What are the Trojan asteroids, and where are they located?

3. Describe the three main classifications of meteorites. How do astronomers believe that these different types of meteorites originated?