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Ms. Campbell - Earth Systems
Feb 2009 Weathering and the Earth
22
Science
6th Grade
02/21/2009

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Term
chemical weathering
Definition
process by which rocks break down as a result of chemical reactions.
Term
physical weathering
Definition
breakdown of rocks into smaller pieces by physical means.
Term
erosion
Definition
process by which wind, water, ice, or gravity transports soil and sediment from one location to another.
Term
glacier
Definition
large mass of moving ice.
Term
ocean current
Definition
movement of ocean water that follows a regular pattern.
Term
climate
Definition
average weather conditions in an area over a long period of time.
Term
El Nino
Definition
change in the surface water temperature in the Pacific Ocean that produces a warm current.
Term
global warming
Definition
gradual increase in average global temperature.
Term
renewable resource
Definition
natural resource that can be replaced at the same rate at which the resource is consumed.
Term
nonrenewable resource
Definition
resource that forms at a rate that is much slower than the rate at which it is consumed.
Term
destructive process
Definition
breaking down the land.
Term
constructive process
Definition
building up the land.
Term
greenhouse effect
Definition
warming of the surface and lower atmosphere of Earth that occurs when water vapor, carbon dioxide, and other gases absorb and reradiate thermal energy.
Term
natural resource
Definition
any natural material that is used by humans, such as water, petroleum, minerals, forests, and animals.
Term
recycling
Definition
process of recovering valuable or useful materials from waste or scrap; the process of reusing some items.
Term
reclamation
Definition
process of returning land to its original condition after mining is complete.
Term
mudslide
Definition
flow of a mass of mud or rock and soil mixed with a large amount of water.
Term
deforestation
Definition
removal of forests or trees.
Term
microclimate
Definition
climate of a small area.
Term
latitude
Definition
the distance north or south from the equator; measured in degrees.
Term
fossil fuel
Definition
nonrenewable energy resource formed from the remains of organisms that lived long ago.
Term
watershed
Definition
area of land that is drained by a water system.
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