Water On The Land: Erosion, Transportation and Deposition Flashcards
How many processes of EROSION are there?
4
What is HYDRAULIC ACTION?
Force of water breaks rock particles away from the river channel.
What is ABRASION?
Eroded rock picked up by river scrape/rub against channel.
Most EROSION happens by…
Abrasion
What is ATTRITION?
Eroded rock picked up by the river smash into each other.
Breaking into smaller fragments.
Edges get rounded as they rub.
What is SOLUTION?
River water dissolves some types of rock.
Chalk and Limestone.
What is TRANSPORTATION?
Movement of eroded material.
How many processes of TRANSPORTATION are there?
4
What is TRACTION?
Large particles (boulders) are pushed along the river bed by the force of the water.
What is SALTATION?
Pebble sized particles bounce along river bed by the force of the water.
What is SUSPENSION?
Small particles (silt and clay) are carried along by the water.
What is SOLUTION? (transportation)
Soluble materials dissolve in the water and are carried along.
What is DEPOSITION?
When a river drops eroded material its transporting.
When does deposition OCCUR?
When the river slows down.
Loses Velocity
Why do rivers SLOW down and DEPOSIT material?
Volume of water falls.
Amount of eroded material in water increases.
Water is shallower (On the inside bend).
River reaches its mouth.
