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28 Cards in this Set
- Front
- Back
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What is a destructive plate boundary? |
These boundaries occur when two tectonic player collide |
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Give an example of a destructive plate boundary |
The Nazca and South American boundary |
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What causes plates to collide |
Convection currents |
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Where are convection currents? |
In the mantle |
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What type of plate is it if it causes the plates to pull apart? |
Constructive plates |
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Give an example of a constructive plate |
Eurasian and North America |
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Name the two kinds of plates |
Oceanic and continental |
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Name the 4 sections of the earths crust |
Crust, mantle, outer core, inner core |
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Where does an earthquake occur? |
The crust |
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What plates can earthquakes occur along |
Passive/transfer plate boundaries |
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What line do the plates move along? |
The fault line |
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What directions can the plates be moving along? |
The same or opposite directions |
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What is the point called where the pressure builds up? |
Focus |
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What does the pressure spread out in after the plates move again? |
Shockwaves |
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Where is the pressure felt the most |
The epicenter |
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Where is the epicentre? |
Directly above the focus |
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Where does the greatest damage occur |
Closest to the epicentre. Gets less as you move away from it |
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What instrument detects earthquakes? |
A seismograph |
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What scale measures earthquakes? |
Richter scale |
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What is the "magnitude " of an earthquake? |
The amount of energy released from an earthquake |
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What type of scale is the Richter scale? Explain what this is? |
Open ended scale. It has no limit to the highest number it can go to. |
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What is the strongest earthquake recorded? What magnitude was it? When did it occur? |
Great Chilean earthquake. 9.5 on Richter scale. 1960. |
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What type of scale is the Richter scale? What does this mean? Give an example. |
Logramithic scale. If an earthquake is measured as 7 then it is ten times stronger than an earthquake measured 6, 100 times stronger than one measured 5 etc. |
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What is the Mercalli scale? |
It measures the effect of the earthquake on the landscape. |
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What numbers does the mercalli scale to to? |
1-12 |
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What is one and what is 12 |
One is no damage. 12 is total devastation. |
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How is the mercalli scale used |
People report that damage in their area |
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What plate is Ireland on? |
Eurasian plate. Europe and Asia |
