The Earth’s crust and the upper part of the mantle are...
cracked into a number of large pieces (tectonic plates).
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What do the convection currents do?
Convection currents within the Earth’s mantle are driven by heat released by natural radioactive processes which cause the plates to move at relative speeds of a few centimetres per year
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Occasionally the plates move very suddenly..
causing an earthquake
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Volcanoes and earthquakes often occur at the..
boundaries between two tectonic plates.
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Can scientists predict earthquakes and volcanic eruptions?
No
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Scientist are trying to find out...
if there are any clues that an earthquake might happen soon.
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Even with these clues, scientists will only be able to say...
if an earthquake is likely to happen, not when it'll happen.
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There are some clues that say a volcanic eruption might happen soon...
before an eruption molten rock rises up into chambers near the surface, causing the ground to bulge slghtly.
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However...
molten rock cools down instead of erupting, so mini earthquakes can be a false alarm.
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Other cards in this set
Card 2
Front
We live on the ...
Back
crust
Card 3
Front
It's very...
Back
Card 4
Front
The mantle is mostly solid but..
Back
Card 5
Front
The Earth’s crust and the upper part of the mantle are...
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