Chapter 4 Vocab List

Unit 4 Vocabulary
(part 2)
1. Erosion-when wind and water move soil and sediment from one
place to another
2. Weathering-the breakdown of rocks into smaller pieces, can be
physical or chemical.
3. Deposition- the process by which water, ice, wind and gravity
deposit eroded sediments in new locations
4. Eco Region –an area defined by its environmental conditions
such as climate, landforms and soil characteristics
5. Pollution-The contaminated air, water, or soil by substances
that are harmful to living organisms
6. Water shed- the area of land where all of the water that is under
it or drains off of it goes into the same place
7. Aquifer-an underground layer of permeable rock (gravel, sand,
silt, or clay) from which groundwater can be usefully extracted
using water well.
8. Groundwater-Water beneath the earth's surface, often between
soil and rock that supply wells and springs.
9. Topography-A description of land surface area with reference to
elevation variations.
Sediment-Earth material that is broken down by processes of
weathering; can be eroded and deposited by the agents of water, wind,
ice, and gravity.