Across
- 4. The process by which plants make their own food.
- 7. The green substance in leaves that absorbs light.
- 9. Living things need this to carry out life processes.
- 10. The main source of energy for all living things.
Down
- 1. Gas produced during photosynthesis.
- 2. Animals get energy from what they eat.
- 3. Iodine turns blue-black in the presence of this.
- 5. Extra sugar made by plants is stored as this.
- 6. Unit used to measure energy in food.
- 8. Plants use water, carbon dioxide and this to make food.