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