3rd Grade of junior high school

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Across
  1. 3. egg shaped
  2. 4. speed in physics
  3. 5. logical/reasonable
  4. 7. ....with envy (colour)
  5. 8. effect or influence
  6. 12. do nothing in Physics
  7. 13. decide
  8. 15. spiral motion
  9. 17. to portray sth
  10. 19. a universal law that pulls everything together
  11. 21. power in other words
Down
  1. 1. extremely angry
  2. 2. developed mammals
  3. 6. once in a ....moon (colour)
  4. 7. strong blow of wind
  5. 9. carry figuratively
  6. 10. it is the white...in the room
  7. 11. think
  8. 14. nobody likes that sheep (colour)
  9. 15. physical feeling
  10. 16. happen
  11. 18. jealousy in other words
  12. 20. you see this colour when you are angry