Across
- 4. human-made device to produce a well
- 5. A climate zone that receives less than an average 250 mm rainfall a year.
- 6. value of something because of its beauty
- 8. Small amounts of water drip from pipes and are positioned, along, above or beneath rows of crops.
- 11. Rainfall caused by warm moist air
- 14. Something left over in the process of making something
- 15. Fresh water rivers, lakes, dams and aquifers.
- 19. Height of the surface of the Earth above sea level.
- 20. Receiving less than 250 mm per year
- 21. adding up all numbers then dividing the total by the amount of numbers.
- 22. The economic cost is the cost of choosing one alternative over another.
- 23. An area characterised by sloping topography
Down
- 1. Areas inland with consistent climates
- 2. Water has economic value because it is scarce, useful and life sustaining.
- 3. where land meets the sea or ocean
- 7. A major river of South Asia
- 9. rock that acts as a filter
- 10. A process whereby land becomes increasingly arid
- 12. An underground basin that stores ground water
- 13. Culture relates to how a societ
- 16. where water changes from a gaseous state to a liquid state.
- 17. process that removes excess salt and minerals from salty water
- 18. The average types of weather