Planetary Science Vocab

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Across
  1. 3. Coal, oil, and natural gas
  2. 6. The Sun and all objects that orbit it
  3. 7. The force that pulls objects together
  4. 8. The layer of gases around Earth
  5. 11. A rocky object that orbits the Sun
  6. 12. Small pieces of matter that formed planets
  7. 18. A streak of light in the sky
  8. 19. A small rock traveling through space
  9. 20. All the solid rocks and land on Earth
  10. 21. Gases that trap heat in Earth's atmosphere
Down
  1. 1. A resource that can be replaced naturally
  2. 2. A space rock that lands on Earth
  3. 4. All the water on Earth
  4. 5. A resource that takes millions of years to replace
  5. 9. Finds planets by watching a star dim
  6. 10. All living things on Earth
  7. 13. A planet outside our solar system
  8. 14. The four major parts of Earth
  9. 15. An icy object that can form a tail
  10. 16. A hole formed by an impact
  11. 17. Finds planets by observing a star's movement