Geography.

5. A porous deposit of rock that acts as a filter to store groundwater that is accessible through the drilling of wells.
8. The process where small droplets of water in clouds combine into larger droplets that eventually become too heavy and fall as either rain, hail, snow or sleet.
9. The average types of weather, including seasonal variations, experienced by a place over a long period of time
10. Height of the surface of the Earth above sea level.
11. Is the area where land meets the sea or ocean.
12. A half of the Earth; usually divided into northern and southern halves by the equator, but can also be western and eastern.
13. The interior of a country or region.

1. The concept of sustainability is about the capacity of the environment to continue to support human life and the life of other living creatures in the future.
2. A climate zone that receives less than an average 250 mm rainfall a year. Evaporation is very high in hot deserts.
3. Insufficient supply or shortage.
4. The day to day climatic conditions.
6. Refers to any process that removes excess salt and minerals from salty water in order to obtain potable (drinkable) fresh water.
7. Is the process where water changes from a gaseous state to a liquid state.
12. A large mountain range in South Asia extending across 2400 kilometres through Pakistan, India, Tibet, Nepal, and Bhutan. Mt Everest is located in the Himalayas.