7th Grade Final Review Part II

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Across
  1. 3. the hard, frozen part of a comet
  2. 5. Neptune and Uranus appear this color due to the methane in their atmosphere
  3. 7. developed the Sun-centered theory of the universe
  4. 11. one probe sent to the Moon to measure conditions and gather mineral samples
  5. 14. the season caused when part of Earth is tilted more toward the Sun
  6. 15. a meteoroid that strikes Earth
  7. 16. the speed of _______ equals 300000 km/s
  8. 18. Neil _________ was the first man on the Moon
  9. 19. a ______ eclipse occurs when the Moon blocks the Sun's light from reaching Earth
Down
  1. 1. the 2nd planet from the Sun
  2. 2. ____________ dating compares rock layers to each other
  3. 4. ____________ dating measures radioactive isotopes to determine the age of a rock layer
  4. 6. one of these equals 1 year
  5. 8. the phase right after the New Moon
  6. 9. Venus & Earth both experience a __________ effect due to their atmospheres
  7. 10. large planet colored with bands of brown, red, and tan
  8. 12. a disturbance in an established rock layer
  9. 13. a bright streak across the sky
  10. 17. the 4th planet from the Sun