Heat rising and falling inside the mantle creates convection currents generated by radioactive decay in the core.
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Name three types of plate boundaries and what happens at each margin
constructive or divergent boundary the plates move apart. destructive or convergent boundary the plates move towards each other. At a conservative or transform boundary the plates slide past each other.
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How are volcanoes formed?
Volcanoes are formed when magma from within the Earth's upper mantle works its way to the surface. At the surface, it erupts to form lava flows and ash deposits. Over time as the volcano continues to erupt, it will get bigger and bigger.
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how are earthquakes caused?
As the oceanic plate is forced below the continental plate it melts to form magma and earthquakes are triggered
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How to prepare for Earthquakes
Make sure they have an evacuation plan. Build roads and bridges to withstand the power of an earthquake
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Signs that a volcano is going to erupt:
Water in ponds getting warmer. Animals and birds moving out from an area
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Primary impacts for an earthquake in Hati:
316,000 people were killed and 1 million made homeless. Transport and communication links were damaged.
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Secondary Impacts for an earthquake in Hati:
Diseases, especially cholera became a problem. People sleeping in streets for fear of more earthquakes.
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Shield Volcanoes.
Are found on constructive plate boundaries Are formed by eruptions of thin, runny lava which flows a long way before it solidifies
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Composite Volcanoes
Are found on destructive plate boundaries Are formed by eruptions of viscous, sticky lava and ash that don’t flow far
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Other cards in this set
Card 2
Front
Name three types of plate boundaries and what happens at each margin
Back
constructive or divergent boundary the plates move apart. destructive or convergent boundary the plates move towards each other. At a conservative or transform boundary the plates slide past each other.
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