Erosion and Deposition

Question 1

What is hydraulic action (erosion)?

Answer 1

Fast-flowing water forced into cracks, breaking up banks over time

Question 2

What is abrasion (river erosion)

Answer 2

Sand and pebbles dragged along the river bed, wearing it away

Question 3

What is attrition (erosion)?

Answer 3

Rocks and stones wear each other away as they knock together

Question 4

What is solution (erosion)?

Answer 4

Rocks such as limestone and chalk are dissolved in acidic rainwater

Question 5

What is traction (transportation)?

Answer 5

Large stones are rolled and dragged along

Question 6

What is saltation (transportation)?

Answer 6

Smaller stones and pebbles are picked up and dropped again in a “skipping” motion

Question 7

What is suspension (transportation)?

Answer 7

Tiny particles of sediment are carried suspended in the river’s current

Question 8

What is solution (transportation)

Answer 8

Dissolved rocks are carried along invisible to the eye