ES Final Exam Review

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Across
  1. 2. planet outside of our solar system
  2. 5. region of solar system beyond Neptune
  3. 8. a scientist that studies the universe
  4. 9. Earth's twin; similar size and density
  5. 12. closed curve whose shape is determined by 2 focii
  6. 13. type of em radiation visible to humans
  7. 15. volcanic process that created atmosphere
  8. 16. group of stars organized into a pattern
  9. 17. trench-like valleys on the moon
  10. 20. a collection of stars, gas, dust bound by gravity
  11. 21. smaller bodies that orbit planets
Down
  1. 1. when Earth is closest to the sun
  2. 3. a ring of debris between inner/outer planets
  3. 4. path a body follows as it travels around another
  4. 6. planet made of rock; iron core
  5. 7. blue-green color likely due to methane
  6. 8. when Earth is farthest from the sun
  7. 10. largest planet in our solar system
  8. 11. closest planet to sun
  9. 14. galaxy containing Earth
  10. 18. planet with a complex ring system
  11. 19. planet with massive volcanoes, canyons; has seasons