Year 7 Science (3)

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Across
  1. 3. Non-renewable, mined from the ground
  2. 5. Biggest moon we see
  3. 6. Non-renewable, drilled for under the ground
  4. 11. Largest planet
  5. 12. Sun blocked by moon's path
  6. 13. This is added to waste water to get 'bits' to stick together
  7. 14. Day and night equal
  8. 17. Name for treated water put back into rivers
  9. 18. Earth orbits the sun
  10. 19. Precipitation in ice form
  11. 20. The solids stuck together at the bottom of a treatment tank
  12. 21. Earth rotates once on its axis
  13. 22. Energy from steam in the ground
Down
  1. 1. When 'bits' stick together in waste water
  2. 2. Pumping air into waste water to make small particles float
  3. 4. Water condenses to make these in the sky
  4. 5. Water passed through sand to remove remaining particles of waste
  5. 7. First stage of water treatment
  6. 8. Smallest planet
  7. 9. Chlorine added to kill bacteria in waste water
  8. 10. Eclipse where Earth blocks sun from shining on the moon at night
  9. 15. No moon
  10. 16. Taking just what you need