Coasts - Theme 2 - EROSION + DEPOSITION + TRANSPORTATION

Question 1

What is hydraulic action

Answer 1

-water forces itself into cracks and compresses the air inside pressurising the rock

Question 2

What is wave quarryinh

Answer 2

-removal of rocks and other debris on a cliff by wave action

Question 3

What is cavitation

Answer 3

• Intense erosion due to the surface collapse of air bubbles found in rapid flows of water
• impolosion of the bubble creates a micro jet of water that travells at high speed

Question 4

What is corrasion

Answer 4

-Sand and pebbles hurld against the cliff foot by the waves

Question 5

What is abrasian

Answer 5

-a sandpapering effect where rocks are dragged along the sea bed

Question 6

What is solution

Answer 6

• Weak acids desolve soluble rock

- also a transport

Question 7

What is attrition

Answer 7

-Rocks hitting each other and wearing down to become smaller

Question 8

What is Suspension

Answer 8

-rock float in the water

Question 9

What is traction

Answer 9

-big rock gets rolled

Question 10

What is saltation

Answer 10

-Rock bounces

Question 11

What effects what can be transported

Answer 11

• DENSITY

- wave energy

Question 12

What is deposition

Answer 12

-sediment is dropped because there is not enough energy

Question 13

Where will deposition happen

Answer 13

• LEC
• constructive waves
• shallow - less friction
• less wind - less wave energy

Question 14

What is the aeolian process

Answer 14

-material eroded transported or deposited by the wind

Question 15

What does the aeolian process form

Answer 15

• Can move sand

- Can form sand dunes

Question 16

Why is wind more likley to pick up sand

Answer 16

• small and dry particles mean less friction

- easier to carry

Question 17

What are the two ways sand is moved

Answer 17

• saltation

- traction/surface creep