Geography

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What are the four layers in the earth's structure?
the inncer core, the outer core, the mantle and the crust
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Which layercis the thickest of the three?
The mantle being 2,900km thick.
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Why is the inner core so hot?
friction occurs as the liquid of the outer core moves over the inner core. there is also radioactive decay being emmited by the core.
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What is a primary hazard?
a primary hazard is the ground shaking, lava, ash, pyroclastic flows. e.g montserrat.
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What is a destructive boundry?
this is where the plates are pushing together. the heaviest plate will sink below the less dense one.
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what is a constructive boundry?
A constructive boundry is where the plates move apart and magma rises and seeps through cracks to gradually build.
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Why do people live in hazard zones?
Tourism industry, iceland, energy, geothermal, iceland, ferile soils, mount etna.
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Name three ways of monitoring a volcano?
seisometers, ground movement, tilt meters, ground steepness on a volcano, gas readings, sulfur dioxide, carbon dioxide.
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Name a landform that is formed on a destructive margin?
a volcano, ocean trench.
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Name a landform at a constructive margin?
mid ocean ridges, rift valleys.
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Other cards in this set

Card 2

Front

Which layercis the thickest of the three?

Back

The mantle being 2,900km thick.

Card 3

Front

Why is the inner core so hot?

Back

Preview of the front of card 3

Card 4

Front

What is a primary hazard?

Back

Preview of the front of card 4

Card 5

Front

What is a destructive boundry?

Back

Preview of the front of card 5
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