Topic 9 and 10
Terms in this set (31)
the chemical and physical breakdown of rock into sediment at or near the earth's surface.
the process by which nature transports earth materials.
the process by which nature releases or drops sediments in new locations.
Physical (Mechanical) Weathering
Breakdown of rock into smaller pieces without chemical change.
expansion of water in cracks when water freezes, causes cracks to grow larger
Alternating freezing and thawing of water.
Root action (Plant action)
roots work their way into rock and break it apart
Removal of overlying rocks reduces pressure and rock expands upward.
physical weathering caused by the grinding of rock particles against rock.
insects, mammals, lizards, etc. Allow air and water to reach buried rocks when they dig up the surface.
alternating heating and cooling of rocks may result in expansion and contraction causing the rock to fracture and break apart.
the breakdown of rock through a change in mineral or chemical composition.
weathering affects exposed surfaces.
smaller particles have greater surface area.
- a mineral has specific chemical and physical properties, which control how it will weather.
temperature and water greatly control the rate of weathering.
formed by the weathering of the bedrock underneath it.
formed by material that is not the same as the native bedrock.
a streams ability to move particles of different size
the average speed of the water in a stream
the overall volume of water in a stream
form when rivers enter lakes/oceans
the more spherical, denser, larger a particle is, the ___________it is
the movement of sediment parallel to the shore as waves strike the shoreline at an angle
human made structures intended to control beach erosion and slow longshore drift
Jetties and breakwaters
protective structures designed to limit coastal erosion
a sudden increase in wave action due to severe weather; flooding is the most dangerous aspect of coastal storms
Tsunamis are the result of underwater----------
Glacial Ice sheets
enormous sheets of ice that move due to the pull of gravity. Some of the material moved is bulldozed in front of the massive ice sheet but most hitches a ride trapped in the midst of the glacier.
Glaciers carve .......