Across
- 7. a substance that enters the environment and has harmful or poisonous effects
- 10. where weather occurs
- 11. the layer of gas that surrounds the Earth and is 600km thick
- 14. where meteorites burn up
- 15. a place where carbon is stored in the carbon cycle
- 16. a molecule made of three oxygen atoms bonded together
- 17. energy from glucose and oxygen
Down
- 1. a region of the stratosphere with a high concentration of ozone
- 2. a gas that traps heat energy in the atmosphere
- 3. where the ozone layer is
- 4. Earth's rigid outer zone
- 5. all the living things on Earth
- 6. all the water on earth
- 8. where the aurora happens
- 9. cycle the movement of carbon through the spheres
- 12. glucose from carbon dioxide and water
- 13. frozen soil in the Arctic