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Volcano - Coggle Diagram
Volcano
-ve Effects of a volcano
Death, destruction, damage
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Poisonous ashes and subtances let out of the volcano can poison fisheries and oceans and change the pH making it unsuitable for species living there or growth of plants.
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Sulfur dioxide and other poisonous chemicals are released into the air. Large areas are covered with soot.
+ve Effects of a volcano
Geothermal energy is where heat from within the Earth is used to generate electricity. Geothermal energy can be generated in areas where magma lies close to the surface. This is good for increasing renewable energy use.
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Volcanoes attract many tourists, who enjoy the dramatic scenery that they produce.
Rising magma brings valuable minerals to the surface, creating mining opportunities.
Perlite is a type of volcanic glass is used in constructions. Fine grades of volcanic ash are used to create silverware and wooden products.
How a volcano occurs
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When two plates collide against one another, friction is produced. This causes one plate to be pushed under another and the rock melts.
The liquid rock rises upwards because it is less dense than surrounding rock and as a result a volcano is produced/ formed.
3 types of volcanoes
Active: A volcano that has erupted recently and is likely to erupt again . 700 active volcanoes across the world. ex: Mt. Etna and Mt. Stromboli
Dormant: A volcano that erupted in the past 200 years but not recently is dormant. Difficult to predict when it will erupt again. Ex: Fuji and kilimanjaro
Extinct: Volcano that will never erupt again, who volcanic activity is over and complete. Ex: Snowdon in Scotland and Edinburg volcano in UK
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Definition
It is a opening in the Earth's crust, which spews out lava, volcanic bombs, ash, pyroclastic fluid and rocks. It is caused due to high pressure created due to magma or molten rock, deep inside the Earth.