EARTH DAY

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Across
  1. 1. H2O
  2. 3. keep safe from harm or injury
  3. 6. the surroundings or conditions in which a person, animal, or plant lives or operates
  4. 9. the part of the earth's surface that is not covered by water
  5. 12. the weather conditions prevailing in an area in general or over a long period of time.
  6. 13. a celestial body moving in an elliptical orbit around a star
Down
  1. 2. invisible gaseous substance surrounding the earth
  2. 4. the planet we live on
  3. 5. a very large expanse of sea
  4. 7. convert into reusable material
  5. 8. the phenomena of the physical world collectively, including plants, animals, the landscape, and other features and products of the earth
  6. 10. 4th month
  7. 11. envelope of gases surrounding the earth or another planet