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Card 6

Front

Volcanoes are found at Destructive and Constructive plate margins. At the destructive plate margin the oceanic plate goes under the continental plate because it's more dense. The oceanic plate moves down into the mantle where it is destroyed. Pool of

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Card 7

Front

Different types of volcano. Composite volcanoes=made up of ash and lava that has erupted, cooled and hardened into layers. The lava is usually thick and flows slowly. It hardens quickly to form steep sided volcano.

Back

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Card 8

Front

Volcanic-(case study) soufriere hills in Montserrat June 25th 1997. Primary impacts=Large areas were covered with volcanic material. Capital city plymouth was buried under mud and ash. Over 20 villages and 2/3 homes

Back

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Card 9

Front

Tourists stayed away and businesses were destroyed which has negative affect on economy. Population decline. Volcanic ash has improved soil fertility. Tourism is increasing as people come to see the volcano. Immediate response=people were evacuated

Back

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Card 10

Front

Long term responses=UK provided 41 million, new docks, an airport and houses have been built.

Back

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Card 11

Front

Characteristics of supervolcano= flat unlike normal volcanoes,cover a large area(much bigger than normal volcanoes), Have a caldera (unlike normal volcanoes where there is just a crater at the top) Global consequences=thousands of cubic kilometres of

Back

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Card 12

Front

Earthquakes=plates get stuck together and when they become unstuck you get earthquakes. You get earthquate at all plate margins. Destructive=tension builds up when one plate gets stuck as it's moving down past the other into the mantle.

Back

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Card 13

Front

The plates eventually jerk past each other, sending out shockwaves (vibration) these vibrations are the earthquake. The shockwave spreads out from the focus - the point in the earth where the earthquake starts. Near the focus the waves are stronger

Back

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Card 14

Front

Earthquakes are measured using 2 different scales: Richter scale=measure ENERGY RELEASED by earthquake called magnitude. magnitude is measured using a seismometer. The mercalli scale=measures the EFFECTS of an earthquake.

Back

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Card 15

Front

Tsunami-(case study) Indian ocean 26th december 2004. Destructive margin. earthquake measurment=9.1 richter scale. The plate moved very quickly which caused a lot of water to be displaced. 30m high waves.Affected many countries=

Back

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