Across
- 3. the basic unit of life
- 4. particle with no charge
- 8. the gases that surround the earth
- 9. controls all cell functions
- 11. all living things need & use this
- 13. positively charged particle in nucleus of atom
Down
- 1. the study of living things
- 2. this type of rock forms when sediments compact & cement together
- 4. this scientist came up with the three laws of motion
- 5. a group of cells working together
- 6. energy due to motion
- 7. earth's entire solid body
- 10. the study of rocks
- 12. all matter is made of these