Across
- 6. The leaves fold up when touched.
- 7. When we breathe, we ........... air into the lungs.
- 8. A type of energy that makes calculator work.
- 11. Human responds to this.
- 12. A form of energy that travels in all direction.
- 14. Cigarette smoke contains this dangerous substance.
- 15. Animals with backbone.
- 16. Is the ability to do work.
Down
- 1. Cockroaches breathe using this.
- 2. Substance in plants that absorb sunlight.
- 3. Animals that live on land and in water.
- 4. It is the excretion product from the kidney.
- 5. Travels in a straight line.
- 9. Is the gas that enters our lungs during breathing.
- 10. Process of plants making their own food.
- 12. Part of the plants which responds to sunlight.
- 13. Process of disposing digested food out of the body.