Show:
Ice and the Nature of Glaciers
Carving and Carrying by Ice
Draining the Land
The Work of Running Water
Streams and Their Deposits in the Landscape
100
What is Ice?
Ice consists of solid water, formed when liquid water cools below its freezing point.
100
Glacial erosion severely modifies the shape of a valley. What are the two types of valleys?
U-shaped V-shaped
100
The process in which water flowing through a channel cuts into the substrate and deepens the channel relative to its surrounding is called...?
Downcutting
100
Stream channels form by downcutting but lengthen by ...?
Headward Erosion.
100
What are the three types of streams?
1) Braided 2) Meander 3) Straight
200
What are the four type of glacier categories?
1) Mountain glaciers 2) Continental glaciers 3) Temperate glaciers 4) Polar glaciers
200
A deep, glacially carved, U-shaped valley flooded by rising sea level is a....?
Fjord
200
What are the 5 types of drainage networks?
1) Dendritic 2) Radial 3) Rectangular 4) Trellis 5) Parallel
200
What are the four ways running water causes erosion?
1) Scouring 2) Breaking and lifting 3) Abrasion 4) Dissolution
200
A meander that has been cut off but remains filled with water is a ....?
Oxbow lake
300
What is ablation?
The removal of ice by sublimation (the evaporation of ice into water vapor).
300
Glacial Erosion....and.... rock.
Polishes and scratches
300
What is the formula for calculating a stream's discharge?
Discharge =Area x Average Velocity
300
The sediment load of a stream or river consists of three components...what are they?
1) Disolved load 2) Suspended load 3) Bed load
300
Streams choked with sediment become....? Streams following a snake like path are...?
-Braided -Meandered
400
Glaciers whose terminus lies in the water are called...?
Tidewater Glaciers
400
Name the six types of glacial sediment.
1) Till 2) Erratics 3) Glacial Marine 4) Glacial Outwash 5) Loess 6) Glacial Lake-bed sediment
400
What are two factors river discharge depends on?
Watershed area and climate
400
What is the broad flat area boarding a stream or river?
Floodplain
400
We distinguish two types of streams that cut across resistant topographic highs, what are they?
-Superposed Streams -Antecedent Streams
500
Which type of glacier flows in high latitudes and spreads over continents?
Mountain Glaciers
500
Name the two types of streams and the difference between them.
1) Permanent Streams 2) Ephemeral Streams -Permanent streams flow all year long while ephemeral streams flow only for part of the year.
500
What is a stream gradient?
The slope of the stream channel.
500
What is the difference between seasonal floods and flash floods?
Seasonal floods submerge floodplains and delta plains at certain times of the year. Flash floods are sudden and short-lived.