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Geo Questions - 2 > Own Knowldge - Evolving Physical > Flashcards

Own Knowldge - Evolving Physical Flashcards

1
Q

Sedimentary rocks

A

Formed of small particles that have been eroded + transported + deposited in layers

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2
Q

Example of sedimentary rocks

A

Limestone + chalk

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3
Q

Features of sedimentary rocks

A

Compressed + can be permeable / impermeable + soft + less resistant to erosion

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4
Q

Igneous rocks formation

A

Created by volcanic activity when magma or lava cools, forming rocks made of crystals

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5
Q

Examples of Igneous rocks

A

Granite

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6
Q

Features of igneous rocks

A

Hard + resistant to erosion

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7
Q

Metamorphic rock formation

A

Existing rocks that have been morphed/changed by extreme heat or pressure + usually comprised of layers

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8
Q

Examples of metamorphic rocks

A

Slate = which is compressed shale

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9
Q

Metamorphic rocks features

A

Very hard + resistant to erosion

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10
Q

How did tectonic processes help shape the overall landscape today

A
  • millions of years ago Britain was much closer to plate boundaries
  • active volcanoes + plate movements caused massive folds + faults in the rocks
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11
Q

How did tectonic processes shape the uplands

A
  • around 300 million years ago tectonic processes caused molten magma, under intense pressure, to rise through the earths crust
  • some magma reached the surface as lava while some cooled + solidified underground
  • the areas above ground cooled + solidified and are now areas of high relief eg. Dartmoor in Devon
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12
Q

What are the uplands formed from

A

Harder, more resistant rock that have eroded at a much slower rate

IGNEOUS + METAMORPHIC

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13
Q

What are lowland made from

A

Softer + younger sedimentary rocks = less resistant to erosion

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14
Q

Example of upland area

A

Dartmoor in Devon

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15
Q

Example of lowland area

A

North + South Downs in south - east England

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16
Q

How has the uplands been shaped

A

Tectonic activity + glaciation

17
Q

How did Dartmoor form

A
  • dome of magma developed underground
  • cooled to form granite + cracks known as joints
  • joints made it vulnerable to freeze thaw weathering
  • overtime as the granite became exposed on the surface, erosion + mass movement removed broken up granite downhill
  • blocks of rocks left standing
  • these forms tors eg. Bower man’s Nose surrounded by clitter slopes
18
Q

What is a scarp slope

A

Steep slope

19
Q

What is a dip slope

A

Gentler slope

Geo Questions - 2 (10 decks)

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