1. What are comets made of?
2. What is the glowing 'head' around a comet called?
3. What do we call the trailing gases behind a comet?
4. What type of comets originate from the Oort Cloud?
5. What type of comets originate from the Kuiper Belt?
6. What type of comets have an orbit of less than 200 years?
7. What region defines the outer limits of the Solar System?
8. In what region would you find the dwarf planet Pluto?
9. Which of the following is a piece of a comet or asteroid that has landed on Earth?
10. Which of the following has been pulled into Earth's gravity, but has not yet landed on Earth?