The surface of the Earth is constantly being changed by forces of nature. Things like moving water, wind and gravity are breaking down the rocks that make up the Earth's surface. These same forces can also move the broken down rocks to different locations.
Unit Essential Question(s):
How do weathering and erosion work together to change the surface of the Earth?
the grinding and wearing away of rock surfaces through the mechanical action of other rock or sand particles
Collectively describes the portions of the Earth's surface where water is in solid form, including sea ice, lake ice, river ice, snow cover, glaciers, ice caps and ice sheets, and frozen ground (which includes permafrost).
Alluvial Fan -
A fan shaped mass of rock material deposited by a stream when the slope of the land decreases sharply; for example, alluvial fans form when streams flow from mountains to flat land.
The movement of sand or other sediments by short jumps and bounces that is caused by wind or water.
the wearing away of Earth's surface by the breakdown and transportation of rock and soil.
a horizontal layer of soil that can be distinguished from the layers above and below it; also a boundary between two rock layers that have different physical properties
dark, organic material formed in soil from the decayed remains of plants and animals
A large mass of moving ice.
Chemical Weathering -
the process by which rocks break down as a result of chemical reactions
A fan shaped mass of rock material deposited at the mouth of a stream; for example, deltas form where streams flow into the ocean at the edge of a continent.
Differentiated Weathering -
the process by which softer, less weather resistant rocks wear away at a faster rate than harder, more weather resistant rocks do
Soil Profile -
a vertical section of soil that shows the layers of horizons
Ice Age -
A long period of climatic cooling during which the continents are glaciated repeatedly.
An area along a river that forms from sediments deposited when the river overflows its banks.
Mechanical Weathering -
the process by which rocks break down into smaller pieces by physical means
Stream Load -
The materials other than the water that are carried by a stream.
a reaction that removes one or more electrons from a substance such that the substance's valence or oxidation state increases; in geology, the process by which a metallic element combines with oxygen