Science 7 Review.

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Across
  1. 3. the part of a plant which makes it green
  2. 5. packages protein fed ex of the cell.
  3. 7. anything with mass
  4. 9. being worn down by long exposure from the atmosphere
  5. 12. rocks breaking down overtime.
  6. 13. the force that slows down objects.
  7. 16. the system of the body which breaks down food.
  8. 17. the force keeping us on the ground.
Down
  1. 1. the particle that makes up everything.
  2. 2. power house of the cell
  3. 4. a negative charge.
  4. 6. organs that are similar in evolutionary origin.
  5. 8. cell reproduction
  6. 10. an object in motion stays in motion.
  7. 11. rocks made of layers of sediment.
  8. 14. south and north poles attracting
  9. 15. the system of the body that helps you breathe.