science

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Across
  1. 2. removal of unwanted plants
  2. 3. reservoirs to store water for household consumption
  3. 6. unit to measure distance in universe
  4. 10. used to harvest crops
  5. 11. water suitable for drinking
  6. 12. rectangular shaped step wells
  7. 15. star closest to solar system
  8. 16. one of the oldest systems used to conserve water
  9. 18. push or pull on an object
  10. 19. dirty water
Down
  1. 1. force per unit area applied to an obeject
  2. 4. contamination of soil
  3. 5. circular path on which planets move
  4. 7. biggest planet in solar system
  5. 8. fourth planet in the solar system
  6. 9. kitchen waste water
  7. 11. decreases soil quality
  8. 13. putting seeds in soil manually
  9. 14. tanks which are light in weight
  10. 17. first task in preparation of soil