Science extra credit marking period 3

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Across
  1. 5. the largest planet in the solar system.
  2. 6. the only known planet that supports life.
  3. 8. the farthest planet from the sun.
  4. 10. a big ball of frozen ice that orbits the sun.
  5. 11. a small rocky body orbiting the sun.
  6. 12. the force of attraction that keeps everything together.
  7. 16. the planets closest to the sun.
  8. 18. a hot ball of gases, our sun is one of them.
  9. 20. the seventh planet from the sun.
  10. 21. the start all the planets revolve around.
Down
  1. 1. an hole with so much gravity light cannot escape.
  2. 2. the planets furthest from the sun.
  3. 3. named after the roman god of war.
  4. 4. the galaxy which our solar system is in.
  5. 7. small rock in outer space, smaller than an asteroid.
  6. 9. the natural satellite of earth
  7. 13. the fastest planet in our solar system.
  8. 14. the sixth planet from the sun.
  9. 15. the smallest planet in our solar system.
  10. 17. was once a planet but now is considered a dwarf planet.
  11. 19. stars, planet, dust, and rocks all held together.