Science Mid Term Challenge

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Across
  1. 4. For every action there is an equal and opposite reaction
  2. 7. speed plus direction
  3. 8. a particle with a nuetral
  4. 9. distance/time
  5. 13. When something is made of 1 atom
  6. 15. a particle with with a negative charge
  7. 18. the amount of electrons in the third energy level
  8. 20. they go across on the periodic table
Down
  1. 1. when plates crash into each other
  2. 2. F=MA
  3. 3. law of inertia
  4. 5. the amount of electrons in the first energy level
  5. 6. when plates move away fro each other
  6. 10. they determine the reactivity an element
  7. 11. they go up and down on the periodic table
  8. 12. change in speed or direction or both
  9. 14. a particle with a positive charge
  10. 16. the side of the periodic table that is very stable
  11. 17. the side of the periodic table that is very reactive
  12. 19. Smallest part of an element
  13. 21. the amount of electrons in the second energy level