Across
- 2. comets take up to 30 million years to orbit the Sun
- 6. burns in Earth’s atmosphere, seen as a shooting star
- 8. asteroids made mostly of metal
- 9. tail always points away from the Sun due to solar wind
- 10. second largest asteroid, visible from Earth
- 12. large asteroids, similar in size to dwarf planets like Pluto
- 13. largest asteroid, contains water
- 15. extinction may have been caused by a large asteroid impact
- 17. asteroids made mostly of carbon
- 19. giant dirty snowballs made of frozen gases, rock, and dust
- 20. Belt region between Mars and Jupiter where most asteroids are found
Down
- 1. asteroids made mostly of silicon
- 3. Belt region past Neptune where short-period comets come from
- 4. Cloud distant edge of the solar system where long-period comets come from
- 5. small asteroids, also called shooting stars when in Earth’s atmosphere
- 7. rocky bodies with no air or atmosphere
- 8. small asteroid still in space
- 11. a meteor that survives the atmosphere and hits Earth
- 14. comets orbit the Sun in less than 200 years
- 16. comets very bright and visible from Earth
- 18. & iron common materials found in meteorites