2.  A violent, usually destructive natural occurrence.

3.  A prolonged period of abnormally low precipitation; a shortage of water resulting from this.

4.  the result of a sudden release of energy in the Earth’s crust.

5.  is a series of water waves caused by the displacement of a large volume of a body of water, usually an ocean.

6.  an overflow of an expanse of water that submerges land.

7.  A storm with a violent wind, in particular a tropical cyclone in the Caribbean.

8.  a violent, dangerous, rotating column of air that is in contact with both the surface of the earth and a cumulonimbus cloud.

9.  an opening, or rupture, in a planet's surface or crust, which allows hot magma, volcanic ash and gases to escape from below the surface.

10.  A large, destructive fire that spreads quickly.

11.  is an ecologically and geographically defined area that is smaller than an ecozone and larger than an ecosystem.

12.  the breaking down of rocks, soils and minerals as well as artificial materials through contact with the Earth’s atmosphere and waters. Mechanical Chemical

13.  is the process by which materials are removed from a region of the Earth's surface.

14.  is the geological process by which material is added to a landform or land mass.

15.  The region draining into a river, river system, or other body of water.

16.  A layer of rock or soil able to hold or transmit much water.

17.  is water that is found underground in the cracks and spaces in soil, sand and rock.

18.  the ratio of the volume of openings (voids) to the total volume of material.  Porosity represents the storage capacity of the geologic material.

19.  is a measure of the ability of a porous material (often, a rock or unconsolidated material) to allow fluids to pass through it.

20.  the introduction of contaminants into a natural environment that causes instability, disorder, harm or discomfort to the ecosystem.

21.  Percolation is the movement of water through the soil, and it's layers, by gravity and capillary forces.

22.  the process by which water on the ground surface enters the soil