Earths structure

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what are the differences between Oceanic and continental crust?
Continental=2.7g/cm^3 granite-smooth, much stronger Oceanic=3.3g/cm^3 basalt-contains extra bits, making it brittle
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Order of earths structure
Lithosphere (Continental crust-oceanic crust), Mantle (Asthenosphere-Lower mantle), Core (outer core-inner core)
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What are the different types of plate boundaries
Constructive, Collision, Destructive, Conservative
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What is the Conservative Plate?
They slide past each other! Can cause destructive Earthquakes! As plates slide past each other they create friction! San Andreas fault, California.
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What is the Constructive plate?
They move apart, and magma rises! Small earthquakes, Not very explosive volcanoes! Iceland, on the mid-Atlantic ridge!
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What is the Destructive plate?
As the plates push together oceanic plate is subducted, As it sinks, it melts and makes magma called andesite! Very destructive volcanoes and earthquakes. can form tsunamis! Andes mountains in Peru and chile!
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What is the collision plate?
Two continental plates of low-density granite colide, pushing up mountains. Earthquakes happen on faults in collision zones! Destructive earthquakes! Himalayas!
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What are the impacts (secondary and primary) of Volcanoes? name 2 for each
primary- Destroys buildings/roads, kills people, crops are damaged Secondary impacts-contamination of food and water supplies, people are left homeless, buisness effected causing unemployment to rise, fires are started
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What are the impacts (primary and secondary) of Earthquakes? name for 2 for each
Primary- destroys buildings/roads, kills people, bursting of pipes or sewers Secondary -can trigger landslides or tsunamis, people left homeless, buisnesses effected causing unemployement
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How can you reduce the risks of earthquakes or volcanoes?
Practise drills, first aid packs (equipment), evacuate people, predict
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Name differences between 2 volcanoes?
Shield- flat and wider, liquidy lava. Formed by eruptions of thin, runny lava. Composite cone volcano- built up of alternate layers of lava and ash, they can explode with great violence Strato Volcano- layered, lava flows are rare because its thick
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how can countries respond to earthquakes or volcanoes?
emergency services set to find survivors, exporting of food and water, camps set up.-L'Aquila, Italy 2009
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Card 2

Front

Order of earths structure

Back

Lithosphere (Continental crust-oceanic crust), Mantle (Asthenosphere-Lower mantle), Core (outer core-inner core)

Card 3

Front

What are the different types of plate boundaries

Back

Preview of the front of card 3

Card 4

Front

What is the Conservative Plate?

Back

Preview of the front of card 4

Card 5

Front

What is the Constructive plate?

Back

Preview of the front of card 5
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