TECTONICS - people living in tectonic areas Flashcards

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1
Q

how many people live close to volcanoes around the world?

A

500 million people close or on them

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2
Q

what are the four main reasons people live near volcanoes?

A

minerals
geothermal energy
fertile soils
tourism

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3
Q

why are minerals present near volcanoes?

A
  • magma rising from inside the earth contains a range of minerals
  • hot gasses elapse through the vents of active volcanoes and bring minerals to the surface
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4
Q

what minerals are present near volcanoes?

A
tin
gold
copper
silver
diamonds 
sulphur
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5
Q

what is geothermal energy?

A

heat energy from the earth

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6
Q

what is a disadvantage of mineral collecting?

A

can be dangerous to people collecting them, especially sulphur

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7
Q

how does geothermal energy work?

A

the heat from underground steam drives turbines which produce electricity

  • or steam heats water supplies
  • if steam doesn’t occur naturally they drill holes in rock
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8
Q

how much of Icelands energy comes from geothermal?

A

2/3’s from steam powered turbines

- it has over 200 volcanoes and 800 hot springs

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9
Q

what can geothermal energy also be used for?

A

recreational purposes

- blaa lonio or the blue lagoon is pool of seawater that is naturally heated by heat below the surface

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10
Q

why are there fertile soils near volcanoes?

A

volcanic rocks are rich in minerals, but they need thousands of years to weather and get broken down before they form rich soils

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11
Q

what is the Naples soil like?

A

very rich nutrient soils due to two volcanoes eruptions 35,000 and 12,000 years ago

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12
Q

why is tourism a thing around volcanoes?

A
  • warm bathing lakes, hot springs, bubbling mud pools and steam vents (geysers)
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13
Q

what are some popular geysers?

A

old faithful in yellow stone and various places in New Zealand

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