7th Grade Final Exam Crossword

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Across
  1. 4. a bright streak across the sky
  2. 5. developed the Sun-centered theory of the universe
  3. 7. large, dark plains of hardened lava on the moon
  4. 9. Neptune and Uranus appear this color due to the methane in their atmosphere
  5. 10. the 2nd planet from the Sun
  6. 11. the phase right after the New Moon
  7. 14. one probe sent to the Moon to measure conditions and gather mineral samples
  8. 17. a meteoroid that strikes Earth
  9. 19. Venus & Earth both experience a __________ effect due to their atmospheres
  10. 22. this telescope uses clear lenses
  11. 23. one of these equals 1 year
  12. 24. the speed of _______ equals 300000 km/s
Down
  1. 1. large planet colored with bands of brown, red, and tan
  2. 2. the ______ telescope does not require light and looks like a large satellite dish
  3. 3. the 4th planet from the Sun
  4. 6. the _______________ spectrum is energy organized by wavelength
  5. 8. ____________ dating measures radioactive isotopes to determine the age of a rock layer
  6. 12. a disturbance in an established rock layer
  7. 13. Neil _________ was the first man on the Moon
  8. 15. ____________ dating compares rock layers to each other
  9. 16. a ______ eclipse occurs when the Moon blocks the Sun's light from reaching Earth
  10. 18. the season caused when part of Earth is tilted more toward the Sun
  11. 20. the hard, frozen part of a comet
  12. 21. this telescope uses curved mirrors