Across
- 2. contains chlorophyll
- 4. a name for stones and sand at the bottom of oceans
- 6. coal, oil and natural gas
- 7. a mountain that erupts lava
- 10. any living thing
- 12. a chemical element
- 13. the material Earth is made of
- 14. the gas that we breathe in
Down
- 1. process by which plants make their own food
- 3. steps or actions that happen together
- 5. air around Earth
- 8. a green substance used by plants to make their own food
- 9. plants need it to make food
- 11. the gas that we breathe out
- 12. Something that never stops