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Geography - Coasts > Weathering > Flashcards

Weathering Flashcards

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1
Q

What is a Coastline

A

A Place where the land meets the sea

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2
Q

Name 3 processes how Material broken down at the coast?

A
  1. Weathering
  2. Mass Movement
  3. Erosion
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3
Q

What is Weathering

A

The break down of rock where it is.
i.e. on a beach

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4
Q

What is Mass Movement

A

The downhill movement of material pulled down by gravity

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4
Q

What is erosion?

A

The wearing away of land by a moving agent - THE SEA

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5
Q

What are the 3 types of weathering

A
  1. Mechanical Weathering
  2. Chemical Weathering
  3. Biological Weathering
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6
Q

What is Mechanical Weathering?

A

causes PHYSICAL CHANGE to the rock SHAPE

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7
Q

What is Chemical Weathering

A

causes CHEMICAL CHANGE to the rock STRUCTURE (holes, making it weaker)

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8
Q

What is Biological Weathering

A

PLANTS AND ANIMALS weaken rock structure

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9
Q

What is an example of the Mechanical Weathering process?

A
  1. Water enters a crack in the rock
  2. Water then freezes and expands. Makes the crack wider
  3. Ice melts and water goes deeper
  4. Repeats until rock splits
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10
Q

What soft rocks are affected by water?

A

Clay and Shales

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11
Q

What does EXPAND mean?

A

Gets Bigger

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12
Q

What does CONTRACT mean?

A

Gets Smaller

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13
Q

What is an example of Wetting & Drying Process?

A
  1. As softer rock gets wet, it expands
  2. When it gets dry it contracts
  3. This creates cracks
  4. The sea spray to penetrate the rock making it unstable
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14
Q

What can happen if softer rocks become unstable?

A

Landslides

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15
Q

Describe the process of Chemical Weathering

A
  1. Carbon Dioxide in the air dissolves in water.
  2. This makes the water slightly acidic
  3. This weak acidic solution can dissolve some types of rock
16
Q

Name types of rock that can be dissolved by acid rain or water

A

Limestone & Sandstone

17
Q

Describe the process of Biological Weathering

A
  1. Roots enter small crack in rock
  2. When roots grow, crack gets
    larger
  3. Rocks break away
  4. Also animals nesting/burrowing
18
Q

What is the Term used for collapsed cliffs or Landslides?

A

Mass Movement

Geography - Coasts (7 decks)

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