UK Physical Landscape Flashcards

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1
Q

Where is the UK’s main upland area?

A

north and west

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2
Q

Where is the UK’s main low land areas?

A

south and east

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3
Q

Igneous

A

formed when molten rock (magma) from the mantle cools down and hardens
the rock forms crystals as it cools
usually hard - granite

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4
Q

Sedimentary

A

formed when layers of sediment are compacted together until they become solid rock

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5
Q

Two main types of sedimentary rock in the UK

A

Carboniferous limestone and chalk - formed from tiny shells and skeletons of dead seas creatures
lime stone is quite hard
chalk is softer

clays and shales - made from mud and clay minerals, very soft

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6
Q

Metamorphic

A

formed when other rocks (igneous, sedimentary or older metamorphic rocks) are changed by heat and pressure
new rocks become harder and more compact
shale becomes slate with further heat and pressure, slate becomes schist

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7
Q

3 past tectonic processes that have shaped UK landscapes

A

Active volcanos
Plate collisions
Plate movements - UK position

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8
Q

How has Active volcanos shaped the UK landscape?

A

520 million years ago UK land was much closer to plate boundary
Active volcanos forced magma through the earths crust which cooled down to form igneous rock such as granite

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9
Q

How has Plate collisions shaped the UK landscape?

A

1) Plate collisions caused the rocks to be folded and uplifted - forming mountain ranges
many of these areas remain as Uplands - Scottish Highlands, Lake District, north Wales
2) Intense heat and pressure due to plate collision formed hard metamorphic rocks in northern Scotland and Northern Ireland

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10
Q

How has Plate movements shaped the UK landscape?

A

345-280 million years ago Britain was in the tropics and higher sea levels - Carboniferous limestone formed
this can be seen in northern England, South Wales and south west England

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11
Q

Granite

A

very resistant and forms uplands landscape
has lots of joints which aren’t evenly spread
impermeable - doesn’t let water through

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12
Q

How are tors formed?

A

Granite has lots of joints which aren’t evenly spread
the parts of the rock where there are more joints wear down faster
areas with fewer joints are weathered more slowly than the surrounding rock and stick out at the surface which forms tors

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13
Q

Moorlands

A

large areas of waterlogged land and acidic soil with low-growing vegetation
created by granite

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14
Q

Slate and Schist

A

Slate forms in layers creating weak planes in the rock
slate is generally very hard and resistant to weathering but it is easily split into thin slabs

Schist has bigger crystals than slate and also splits easily into small flakes

both often form rugged upland areas
impermeable which can lead to waterlogged and acidic soils

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15
Q

Carboniferous limestone

A

permeable so limestone areas have dry valleys and resurgent rivers
affected by carbonation weathering - happens along joints in the rocks creating features such limestone pavements, caverns and gorges

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16
Q

Chalk and clay

A

chalk is harder than clay
chalk forms escarpments (hills) in UK lowlands and cliffs at the coast
chalk is permeable - water flows through it

clay is very soft and easily eroded
clay forms wide flat valleys in UK lowlands
clay is impermeable - water flows over the surface

17
Q

Physical processes that have shaped UK landscape

A

Weathering
Erosion
Post-glacial river processes
slope processes

18
Q

Weathering

A

breakdown of rocks into smaller pieces

types of weathering: mechanical, chemical, biological

19
Q

Erosion

A

erosion wears away rocks
during the last glacial period ice eroded the landscape
rivers and the sea now constantly erode the landscape

20
Q

Post-glacial river processes

A

melting ice at the end of glacial periods made rivers much bigger - with more power it erode the landscape
ice also left distinct landforms when it melted

21
Q

slope processes

A

including mass movement such as rockfalls, slides, slumps and soil creeps

22
Q

How have humans changed the landscape?

A

Agriculture
Forestry
Settlement

23
Q

Agriculture

A

People have cleared forests to make space for farming

24
Q

Forestry

A

the management of areas of woodland

can be used for timber, recreation or conservation

25
Q

Settlement

A

land was concreted over for roads and buildings - affected drainage patterns
some rivers were diverted through underground channels
river channels were straightened or had embankments built to help prevent flooding

26
Q

2 ways that past glacial processes have shaped upland areas in the UK

A

1) ice eroded landscape - carving out U-shaped valleys

2) as glaciers melted they deposited thick layers of unsorted material on the landscape