Across
- 3. Two or more elements combined
- 6. The green pigment inside plant Cells that absorbs light energy
- 7. The gas absorbed by plants.
- 8. The ability to do work.
- 10. The process by which plants use light energy to create food.
- 11. The interaction between two or more chemicals that produce new chemicals.
- 12. A substance that cannot be broken down into a simpler form.
- 13. a simple sugar that is an important energy source in living organisms.
Down
- 1. The layer of gasses that surround our planet molecule smallest particle of any material.
- 2. The production of energy by the addition of oxygen
- 4. Gas breathed in by animals
- 5. A living thing that can function on its own.
- 6. smallest unit of all living things.
- 9. smallest particle of an element.