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Across
  1. 1. A human-made object that orbits Earth.
  2. 4. The circular movement of Earth around the Sun.
  3. 6. Small plastic pieces harmful to aquatic life.
  4. 10. Planet that we live on.
  5. 11. Most common gas in Earth’s atmosphere.
  6. 12. Type of pollution caused by burning fossil fuels.
  7. 13. of using items again instead of throwing them away.
  8. 14. Underground source of water.
  9. 15. Season that occurs when a hemisphere tilts away from the Sun.
Down
  1. 2. Gases from pollution can mix with water to form this harmful rain.
  2. 3. Natural satellite of the Earth.
  3. 5. Process where water changes from liquid to gas.
  4. 7. The process of vapor turning into liquid.
  5. 8. The layer of gases around the planet.
  6. 9. Object at the center of the solar system.
  7. 10. The shape of Earth’s orbit around the Sun (slightly ________).