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13 Cards in this Set
- Front
- Back
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Active volcanoes |
- currently erupting -expected to erupt in the futre
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dormant |
currentlly inactive but may erupt in the near future |
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Extinct |
without current seismic activity
no geological evidence of eruptions for the past thousands of years |
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Risk of living near volcanic areas |
- Destruction by volcanic materials - Landslides Pollution - Effects on weather |
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Destruction by volcanic materials |
- during a volcanic eruption , lava, rock fragments and volcanic bombs and ash ,
- Damages property
- lava with high temperatures - burns areas it flows through
- Low -silica lava flows through a greater area
- inhaling ash and gas , resulting in serious injury or death
- Heated rocks damages property
- Kilaulea hawaii , 1983 |
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Landslides |
- Occur due to structure collapse of a volcaic cone
- Landslides obstruct flow of rives causing floods , blocked roads , buried vilages , farmlands |
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Pollution |
- ash particles produced during volcanic eruption
- disrupts human activities
- Block sunlight , suffocating crops ,
- severe respiratory problems
- gases such as carbon dioxide , sulphur dioxide , carbon monoxide , harmful to people
- Can impact places further away
- Danger to aircraft engines and structure
- Connecting flights worldwide cancelled |
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Weather |
Sulfur dioxide - eruption
- reacts with water vapour , cause acid rain
- Sulfur based particles , reflect sun's energy back into space
- Temporarily cool the earth
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Benefits of living near volcanic areas |
1) Fertile volcanic soil 2) Precious stones and minerals 3) tourism 4) Geothermal energy |
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fertile soil |
- lava and ash , break down to form fertile volcanic soils
- riches soils on earth
- favourable to agriculture
- Volcanic soils of java Bali , indonesia |
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presious stones and minerals |
- volcanic rocks
- rich in precious stones and minerals
- only found in volcanic areas after millions of years
- diamonds
- diamonds useful for industrial tools and scientific research , jewellery
-java Indonesi ---- sulfur from active volcanoes -- make matches and fertilisers and refine sugar |
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Tourism |
Offers activities for tourist
- hike and camp - enjoy the scenery
- history -learn
- Pompeii italy - 3 million people visit each year |
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Geothermal energy |
- derived fron heat in the earths crust
- underground water comes into contact with hot rocks beneath the surface , heats up and erupts as hot water or steam .
Can be harnessed to drive turbines and produce electricity
Iceland 70% geothermal energy --- electricity |
