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Earthquakes
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True or False? Engineers can not build buildings to help withstand earthquakes?
False. Engineers can make many adjustments to building designs to make them safer.
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Is the change caused to the earth's surface during an earthquake a rapid change, or a slow change?
Rapid. It does not happen over decades or centuries. It happens in a matter of minutes.
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What is the point on the earth's surface right above where the earthquake occurs?
Epicenter
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What is the top-most layer of the earth called?
The crust
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What causes the earth to shake during an earthquake?
When the plates rub together, it causes a ripple effect on the crust, or earth's surface.
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What instrument is used to measure earthquakes?
Seismograph
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True or False? Very stiff rigid buildings withstand earthquakes well?
False. A building that actually sways and flexes with the movement of the earth's surface is much safer.
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What happens when 2 of the earth's plates slip past each other?
An earthquake
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True or False? The size of the earthquake is called the Magnitude?
True. There is one magnitude for each earthquake.
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Name at least one way that engineers make a building safer during an earthquake.
Putting the building on huge bearings or rollers to move with the earth's surface. Allowing the building the flex and sway.
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What is the line along the 2 moving plates called?
Fault
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