Exam 3 Flashcards
In the weathering process of pressure release fracturing
Bedrock expands and fractured when the overlying rock erodes away
Wind, flowing water, glaciers, and gravity are agents of
Erosion
Piles of rock debris found at the base of cliffs in high alpine areas are likely the result of
Frost wedging
In the process of hydrolysis
Minerals weather by incorporating water
Soil is a mixture of
Mineral grains, organic matter, gas, water
A flowing mixture of clay, silt, sand, and rock in which more than half of the particles are larger Han sans is called
Debris flow
A type of mass wasting in which a segment of bedrock moves downslope along a fracture is called
Rockslide
What proportion of the earths surface water is fresh water
2.5%
Most of the surface fresh water is contained in
Ice sheets and glaciers
Stream, -, discharge, and channel shape determine the velocity of a stream
Gradient
A streams erosional strength is
Greatest in a fast flowing stream
Boulders and cobbles are carried by a stream as
Bed load
The water on the outside of a stream curve moves
Faster than the water on the inside, thus enforcing meandering of the stream
If a stream cuts through the narrow neck of land separating two meanders, the abandoned meander loops may become isolated to form an
Oxbow lake
When a stream has a greater supply of sediment than it can carry
It forms a braided stream
The top of a waterfall is a
Temporary or local base level
The region from which all the water flows into a river is its
Drainage basin
High gradient streams are likely to form
Vshaped valleys
A - is the large scale feature built up of sediment deposited where a steam enters the ocean
Delta
During a flood, a stream overflows its banks and water covers the adjacent -.
Flood plain
A nutrient rich lake is called
Eutrophic lake
Turnovers in lakes situated in temperate climates typically occur in
Spring and fall
- is the proportional volume of to k or soil that consists of open spaces.
Porosity
The region of the crust above the water table that is most, but unsaturated
Zone of aeration
In a typical aquifer, ground water flows at
A few cm per day
Caverns usually form in
Limestone
Any process that uses water then returns it to earth far from its source is
Consumption
Domestic water use accounts for - % of all water used in the US
10
- in ground water forms near the well where water is withdrawn after than it can flow
Cone of depression
If too much fresh water is pumped out of a coastal aquifer
Saltwater intrusion can occur
An example of non-point source pollution is
Fertilizer over a field
Which is w most logical sequence of steps in identifying and treating a contaminated aquifer?
Discovery, elimination, monitoring, modeling, remediation.
Rounded ice grains called firm form
If snow survives through 1 summer
Alpine glaciers occur
Near mountaintops at high elevations on all continents
During basal sliding a glacier moves
On a thin film of water
- separates the zone of accumulation from the zone of ablation.
Snow line
Sea ice forms
When surface ocean water freezes
Glacial - form as rocks are dragged along at the base of a glacier
Striations
A smaller glacial valley that meets the main valley with a large vertical offset is called a
Hanging valley
- is sediment that was dirt transported by a glacier and then transported and deposited by a stream
Stratified drift
