1.2- Coastal Landscapes Flashcards Preview

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Flashcards in 1.2- Coastal Landscapes Deck (49)
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1

What are the 3 types of weathering?

chemical, biological and mechanical

2

What is chemical weathering?

rocks reacting with slightly acidic water

3

What is biological weathering?

action of plants and animals causing the rocks to widen and split apart

4

What is mechanical weathering?

water falls into the cracks in rocks and freezes, causing it to expand. over time the repeated thawing and freezing causes the rocks to break apart

5

What is mass movement?

the downhill movement of material under the influence of gravity

6

What are 4 types of coastal erosion?

abrasion, attrition, hydraulic action and soloution

7

What is abrasion?

breaking waves containing sand erode the shoreline or headland. It is also known as the sandpaper effect.

8

What is hydraulic action?

The sheer weight and impact of water compressing air in rock joints forcing them apart.

9

What is attrition?

rocks and pebbles carried by waves smashing together and breaking into smaller pieces

10

what is solution? (erosion)

the chemical action of seawater dissolving some rocks

11

What is soil creep?

individual particles of soil moving down a slope under 5he influence of gravity

12

What is sliding?

where material moves rapidly downslop in one go like a landslide.

13

What is slumping?

when the ground also rotates

14

What are flows?

masses of with water flowing like a liquid downhill

15

What what causes rain to become more acidic?

pollution

16

What is longshore drift?

the process at which sand is transported along the beach by waves.

17

What is traction?

large boulders being rolled along the seabed

18

What is salatation?

smaller stones being bounced along the seabed.

19

What is suspension?

sand and small particles being carried along in the flow

20

what is solution? (transportation)

some minerals being dissolved in seawater and carried along with the flow

21

What is deposition?

the dropping of sediment

22

What is the process of longshore drift?

waves approach the coastline at an acute angle. bringing sediment onto the beach with the swash. sediment is then dragged back down by the backwash under the force of gravity at a right angle. this process continues in a zig zag pattern moving sediment along the beach.

23

what is a constructive wave?

a wave that deposits sand
swash is stronger than backwash
low energy
occur in calm conditions

24

what is a destructive wave?

a wave that erodes sand
swash is weaker than backwash
high energy
occur in stormy conditions

25

what is a concordant coast?

A coast that is made up of the same type of rock

26

what is a discordant coast?

a coast that is made up of many different types of rock. it forms headlands and bays because some rock is erodes faster.

27

what are joints?

smaller cracks in rocks

28

what are faults?

larger cracks in rocks

29

what are some effects of stormy weather?

mass movement contribution
frequent storms erode landforms
beach sediment is removed
sand dunes can be removed by storms
flooding causes soil saturation

30

what is coastal erosion?

the breakdown and removal of material along the coast