Geography-restless earth

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What is the Earth's crust divided up into?
Continental; thick and less dense. Oceanic; thinner and more dense.
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Types of plate margins
Destructive; moving towards eachother,oceainc subduts and creates volcanes ocean trenches. Constructive; move apart, knew land formed. Conservative;slide past (different speed/direction) earthquakwes occur.
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How are fold mountains formed?
When two continental plates collide sediment is piushed together. E.G. Alps
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How are fold mountains used?
Farming, Mining, Hydro electric power, Forestry,Tourism
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Fold Mountains CASE STUDY
Alps: FARMING;goats and terraced to plant vineyards. TOURISM; extreme activities and cablescars, chalets, villages built. HEP; more rain and steep releif. MINING; ores available. FORESTRY; pine used for furniture
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What problems do the residents of fold mountains face and how have they adapted to it?
STEEP RELEIF;goats well adapeted, trewes protect from avalanches. POOR SOIL; animal grazed instead. LIMITED COMMUNICATIONS; roads, tunnels link different mountains
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Where are volcanoes found?
destructive, constructive plates margins and at hotspots
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Types of volcanoes and characteristics.
COMPOSITE; layers of ash and lava, steep sides, narrow base, thick lava. SHEILD; lava layers only, gentle slope, wide base, runy lava. DOME; lava l;ayers only , steep slopes, thick lava.
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How do you predict earthquakes?
small earthquakes, escaping gas, change of shape, animal behaviour.
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How are supervolcanoes formed?
Magma rise creates basin(bulge), cracks /vents form, lava escapes, basin empties and collapses, cratwer left behind.
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what are the consequences of a supervolcanoe eruption?
releae; rock, ask, lava (1000s of km), cloudof hot gas burns everthing within 10miles, ash blocks out daylight(mini-iceage)and cover buildings, crops.
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How are earthquakes fromed?
friction builds up, tension relesed at focus. Shock waves (vibrations) released touching epicentre. (DEEPER THE FOCUS THE WEAKER THE EARTHQUAKE- ABSORBSED AWAY)
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How are earthquakes measured?
RICHTER; measures energy relaead (magnitude),seisometer measures the vibrations. MERCALLI; measures effect of an earthquake, eye witness observations(photos,words)
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How is a tsunami formed?
earthquake takes place under water, displaces water which becomes a giant wave.
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Other cards in this set

Card 2

Front

Types of plate margins

Back

Destructive; moving towards eachother,oceainc subduts and creates volcanes ocean trenches. Constructive; move apart, knew land formed. Conservative;slide past (different speed/direction) earthquakwes occur.

Card 3

Front

How are fold mountains formed?

Back

Preview of the front of card 3

Card 4

Front

How are fold mountains used?

Back

Preview of the front of card 4

Card 5

Front

Fold Mountains CASE STUDY

Back

Preview of the front of card 5
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