Across
- 2. the act of protecting or preserving something in order to keep it from running out or being used up
- 3. having to do with farming or growing food
- 5. a substance that covers a surface or that lies between two other things
- 7. able to work well, without wasting time, money, or energy
- 8. a layer of rock that can hold water
- 12. to replace, refill, or restore naturally
- 13. characterized by waste; not efficient
- 15. a long period of dry weather, when there is not enough water for plants and animals to live
- 17. a useful thing
- 18. a process in which salt is removed from salt water
- 19. the belief or feeling that something bad will definitely happen
- 20. to protect or preserve something so that it will not run out or be used up
- 21. a choice you can make in a particular situation
- 23. the rain or snow that falls on the ground; the amount that falls
- 25. the sum of units in a set divided by the number of units
- 28. an artificial method of watering crops, such as through channels or pipes
Down
- 1. the practice of farming or growing
- 4. able to replace itself; unable to be used up
- 6. extremely serious; very bad
- 9. a plant that has thick leaves or stems able to store water
- 10. extremely dry because of hot weather and lack of water
- 11. safe for drinking
- 14. the typical weather conditions in a particular place
- 16. a large country or the world
- 17. to change one thing into something else
- 22. materials that make something unclean
- 24. relating to homes
- 26. a small cave
- 27. the layer of bricks, cement, or stones under a building for support; the base of something