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