Geography Tectonic Plates

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  • Created by: Elisabeth
  • Created on: 02-04-13 13:24
What is a destructive plate boundary?
Where two plates are moving towards each other Eg. east coast of japan. This causes earthquakes and volcanoes.
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What is a conservative plate boundary?
When two plates are moving sideways past each other or are moving in the same direction at different speeds Eg.West coast of USA. This causes earthquakes.
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What is a constructive plate boundary?
Where two plates are moving away from each other Eg. Mid-atlantic ridge. This causes volcanoes/
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What is the core?
The center of the Earth. A ball of solid iron and nickel.
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What is the mantle?
It is a semi-molton rock that moves very slowly.
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How do fold mountains help create electicity?
Hydro-electric power (HEP) steep sided mountains and high lakes make fold mountains ideal for generating power. Eg. Switzerland gets 60% of its electricity from HEP
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How do fold mountains help create tourism?
Fold mountains have great scenery. In winter people visit to do winter sports like skiing and ice climbing. In summer people go trekking.
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What is the focus?
The point in the earth where the earthquake starts. Near the focus the waves are stronger and do more damage.
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What is the epicentre ?
The point on the earths surface straight above the focus.
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What is the Richter scale?
It measures the amount of energy released by an earthquake. The Richter scale doesn't have a limit and a magnitude of 5 is 10 times more powerful than a magnitude of 4.
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What is a primary effect?
The immeiate effects of the tectonic activity. Eg. buildings collapse
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What is a secondary effect?
The effects that happen later on. Eg. people are left homeless
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What is a tsunami?
They are a series of enormous waves caused when huge amounts of water get displaced
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Why are the impacts more severe in LEDCs?
There's more low quality housing in poorer countries. This is less stable, so is destroyed easier. Also the infrastructure is worse in LEDCs therefore roads are more easily destroyed and it is harder for emergency services to get around.
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Why do people still live in places with tectonic hazards?
Better farming,geothemal energy,tourism, mineralisation,building materials,industrial products,health and beauty,always lived there,employed in the area,confindent of support of the government and people think that tectonic hazard are not likely.
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How can you reduce the impacts of earthquakes using prediction?
There are clues about when an earthquake is about to happen Eg. small tremors. Also you can predict by using data from past earthquakes
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How can you reduce the impacts of earthquakes using building techniques?
A large computer controlled counterweight moves in opposite way to earthquake stopong it from moving. Cross bracing allows more flexiblity and stops the building from twisting which prevents cracking. Rubber shock aborbers in foundations.
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How can you reduce the impacts of earthquakes using planning?
Future development can be planned to avoid the areas most at risk from earthquakes. Firebreaks can be made to reduce the spread of fires. Training emergency services. Government can plan evacuation routes.
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How can you reduce the impacts of earthquakes using education?
The government and schools educate people what to do during an earthquake, they can be taught how to use a survival kit. Eg. Japan has an earthquake day to make sure peole know what to do in an earthquake.
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Other cards in this set

Card 2

Front

What is a conservative plate boundary?

Back

When two plates are moving sideways past each other or are moving in the same direction at different speeds Eg.West coast of USA. This causes earthquakes.

Card 3

Front

What is a constructive plate boundary?

Back

Preview of the front of card 3

Card 4

Front

What is the core?

Back

Preview of the front of card 4

Card 5

Front

What is the mantle?

Back

Preview of the front of card 5
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