Attrition in geography

Rocks in seas knocking against each other, getting smaller

Solution corrosion in geography

Solvable rocks dissolving in ocean due to acidity

Ocean water compressing air in rock gaps, causing expansion and cracking.

Abrasion in geography

Erosion of rocks against a rocky platform

Solution in geography

Chemicals in rocks dissolving, leaving gaps

Suspension in geography

Process of small particles carried in oceans without settling.

Saltation in geography

Bouncing movement of rocks in water

Traction in geography

Stone rolling along seabed with waves

Movement of sediment in zigzag along coast due to wave action

Definition of long shore drift

Material dragged down the beach, moved parallel along the coast in a zigzag, deposited further down the coastline.

First step of long shore drift

Prevailing wind causes waves to approach at 45 degrees

First step of long shore drift

Prevailing wind causes waves to approach at 45 degrees

Second step of longshore drift

Swash of waves follow same direction washing sediment up beaches

Third step of longshore drift

Backwash of waves wash sediment down sea at 90 degrees

Fourth step of longshore drift

Process repeats in zig zag motion, eventually disposing sediment

Direction of sediment in longshore drift

Travels parallel to the shoreline

Material eroded from other parts of the coast transported further along the coast

Geological processes on Earth's surface; influenced by weathering, erosion, mass movement.

Mass movement triggers

Heavy rainfall or after earthquakes

Freeze-thaw weathering process

Water freezes and expands in rock cracks, causing fragmentation.

Salt weathering process

Growth of salt crystals in rock causes cracking

Chemical erosion of iron with oxygen; soluble in strong acids.

Breakdown of rocks at Earth's surface by natural forces.

Main cause of coastal erosion

Action of waves and currents on the shoreline

Primary factor for sand dune formation

Wind action transporting and depositing sand

Hydraulic action in river erosion

Water compresses air in cliff cracks, causing erosion.

Role of groynes in coastal management

Trap sand and reduce longshore drift

Waves and erosion Flashcards

Student preview

36 questions

Show all answers

1.

FLASHCARD QUESTION

Front

Energy source for waves

Back

Wind

2.

FLASHCARD QUESTION

Front

Fetch

Back

Distance wind travels uninterrupted

3.

FLASHCARD QUESTION

Front

Destructive waves: steep wavefront?

Back

True

4.

FLASHCARD QUESTION

Front

Waves that create steeper beaches

Back

Destructive

5.

FLASHCARD QUESTION

Front

Erosion: Natural process of waves hitting shores

Back

Displaces and breaks down material to form rocks and beaches

6.

FLASHCARD QUESTION

Front

Type of erosion by soluble chemicals in ocean acidity

Back

Solution

7.

FLASHCARD QUESTION

Front

Erosion by waves breaking through rocks

Back

Hydraulic action

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