ES 11.1-11.2 Review

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Across
  1. 4. the most basic unit of time
  2. 5. each season begins with an________or solstice
  3. 6. most of our units of time are based upon the motion of the_______
  4. 8. this type of telescope uses mirrors instead of lenses
  5. 9. this technique uses computer-controlled mirrors that constantly flex and bend to correct for atmospheric distortion
  6. 11. white light is actually made of combined colors of the rainbow
  7. 12. this calendar is based on the length of a solar year
  8. 14. who developed the first reflecting telescope
  9. 16. level of detail
  10. 17. the____year is the time it takes the earth to orbit the sun once
Down
  1. 1. the most important instrument used by astronomers
  2. 2. this type of telescope studies radio waves
  3. 3. a ______month is a little longer than 29 ½ days
  4. 7. a device that splits light into a spectrum for analysis
  5. 10. these are needed to divide time into years and months
  6. 12. the nation of Israel uses this calendar
  7. 13. this space telescope can “see” without any atmospheric distortion
  8. 15. the________is not based on a heavenly body
  9. 16. this type of telescope uses lenses instead of mirrors