Lesson 4 Crossword

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