Einstein Crossword Puzzle

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Across
  1. 2. A statement in mathematics that shows that two things are equal
  2. 3. An amount of something
  3. 4. The building of something
  4. 8. How much of something
  5. 10. To go on
  6. 12. A person who is trained in science
  7. 14. To say that something is true
  8. 15. To pull to someone or something
  9. 16. To tell someone what they should do
  10. 18. To be connected in some way
  11. 19. office You get a document here that lets you make or sell something new
  12. 20. The power that makes something fall to the ground
  13. 21. Power
Down
  1. 1. To feel shocked , sad and afraid
  2. 3. The time in-between
  3. 4. There is a relationship between them
  4. 5. The prize given to people who have done important work each year
  5. 6. To make something new
  6. 7. A line along which something moves
  7. 9. It can happen
  8. 11. To find out about something that you have not known before
  9. 12. How fast something is
  10. 13. Material that everything in the universe is made of
  11. 17. Damage so that you can not use it any more