Across
- 6. Process plants use to make food using sunlight
- 8. Force that pulls objects towards Earth
- 9. Group of living and nonliving things interacting
- 11. Resistance when objects rub together
- 12. Basic unit of life
- 13. Organelle that produces energy in a cell
- 14. Center of an atom
Down
- 1. Speed in a specific direction
- 2. Organelle that controls the cell
- 3. Smallest unit of matter
- 4. A push or pull
- 5. Condition of the atmosphere at a given time
- 7. Movement of an object
- 9. Ability to do work
- 10. Large piece of Earth's crust