Across
- 3. the layer on earth that protects use from the radition
- 5. a place to dispose of refuse and other waste material
- 7. use again
- 9. panel absorb the sun's rays as a source of energy
- 12. the month earth day is
- 14. the star around which the earth orbits
- 15. natural world as a whole
- 16. discarded matter
Down
- 1. what the earth is mostly made of
- 2. envelope of gases surrounding earth
- 4. the weather condition we live in
- 6. biological community of interacting organisms
- 7. use again or more than once
- 8. not used
- 10. all organisms that grow or live wild in an area without being introduced by humans
- 11. trash in a public place
- 13. we take care of them and water them