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