Spelling 22

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Across
  1. 5. These are used to send and receive messages through radio signals.
  2. 8. This word means that the Earth is the center of our solar system.
  3. 11. ________ observations were difficult until the invention of the telescope.
  4. 14. This word means that the sun was the center of our solar system.
Down
  1. 1. This term is used to describe objects in space.
  2. 2. My teacher has to ________ my progress in math.
  3. 3. Plants are __________.
  4. 4. I met all the ______ for the project and received an A+.
  5. 6. I measured the distance to be ___________ 10 feet.
  6. 7. The distance between two points on a circle and through the center point.
  7. 9. A cloud of gas and dust in space.
  8. 10. If my ______ is accurate, I will earn $10.
  9. 12. Relating to the earth or those who live there.
  10. 13. Pluto is no longer considered a _______.
  11. 15. The New Horizons spacecraft will _____ Pluto.