Across
- 5. - we live around it
- 6. - They recycle carbon through photosynthesis
- 7. - Another term for water
- 8. - a large group of organism
- 11. hot or cold
- 13. - unwanted materials
Down
- 1. - summer, winter, autumn and spring
- 2. - Humans need this in order to breathe
- 3. - a place dominated by trees
- 4. - converstion of old or waste materials into something new
- 6. contaminants in the natural environment
- 9. - energy from the sun
- 10. -CO2
- 12. - ability to do work
- 14. - where we plant trees