!Earthquakes!

What is an earthquake?

• caused by the movement of parts of the Earth's crust, its outermost layer.

• underground rock suddenly breaks and there is rapid motion along a fault.

• what happens when two blocks of the earth suddenly slip past one another.

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NGSS.MS-ESS2-3

What causes earthquakes?

• Convergent boundary

• underground rock suddenly breaks and there is rapid motion along a fault

• The mantle

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NGSS.MS-ESS3-2

How do earthquakes cause damage

• damage does not usually occur until the earthquake magnitude reaches somewhere above 4 or 5.

• damage does not usually occur until the earthquake magnitude reaches somewhere above 4 or 5.

• ground shaking, ground rupture, landslides, tsunamis, and liquefaction

Tags

NGSS.MS-ESS3-2

Does the earth open up after an earthquake?

• The earth does not crack open like the Grand Canyon.

• ground shaking, soil liquefaction, landslides, fissures, avalanches, fires and tsunamis.

• That's just a myth

Where do earthquakes occur?

• Florida and North Dakota

• along faults

• Along the rim of the Pacific Ocean

Tags

NGSS.MS-ESS2-3

NGSS.MS-ESS3-2

Will there be aftershocks after earthquakes?

• Most large earthquakes are followed by additional earthquakes, called aftershocks

• there will certainly be aftershocks,

• it is quite possible that people may feel more shocks.

• it is quite possible that people may feel more shocks.

Tags

NGSS.MS-ESS3-2

Can earthquakes be predicted

• seismologists have gotten much better at forecasting earthquakes.

• quake prediction is notoriously difficult.

• earthquake prediction has never been achieved successfully in a way which could be repeated

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NGSS.MS-ESS3-2

Are certain areas of earth more active then others

• the Circum-Pacific belt,

  the Alpide belt,

  the mid-Atlantic Ridge.

• Earthquakes are more common in some parts of the world than others

• Ring of Fire

Tags

NGSS.MS-ESS3-2

What is the intensity of an earthquake

• 8.8 to 8.9

• a number that characterizes the severity of ground shaking at that location by considering the effects ofthe shaking on people, on manmade structures, and on the landscape.

• A seismograph is the primary earthquake measuring instrument.

Can people cause earthquakes?

• Yes

• No

Tags

NGSS.MS-ESS3-4