unit 21

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Across
  1. 3. below the surface of the Earth
  2. 7. a person who goes into outer space
  3. 8. unexpected thing that may cause some trouble
  4. 12. a tool people use to look at the stars
  5. 13. who is awake is not asleep
  6. 16. to be active and do something
  7. 19. a machine sent into space to get information
  8. 20. its size, especially when it is very large
Down
  1. 1. the feeling of not being afraid
  2. 2. a type of substance found in the Earth
  3. 4. to make something come out of a container
  4. 5. the force that makes things fall to Earth
  5. 6. to move on top of water without sinking
  6. 9. to allow someone to have it
  7. 10. the act of allowing some action
  8. 11. to not do it
  9. 14. to make your arms or legs reach out
  10. 15. a beautiful stone that is worth a lot of money
  11. 17. natural and not processed
  12. 18. a person who works in a mine