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Earthquakes

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Mohammad Gaylord

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Cards in this guide (19)
At divergent plate boundaries in the ocean magma rises and melts because of what

Because of a decrease in pressure.

A tsunami can occur when there is vertical movement at a fault under

The ocean floor.

What process occurs when an earthquake's shaking turns loose soil into mud

the answer is liquefaction

How much of an increase in wave amplitude is seen from an earthquake measuring 5.4 on the Richter scale compared to one measuring 4.4

Ten times

What are earthquakes usually associated with

fault

What is the area along a fault where there has not been any earthquake activity in a long period of time

A seismic gap, where future large earthquakes are expected.

What are the three main types of glacial erosion

The 3 main types of glacial erosion are plucking, abrasion and freeze thaw.

Which is not a factor in calculating the moment magnitude of an earthquake

magnitude of past earthquakes in the area

What is the difference of the P waves and S waves used to locate an earthquake's epicenter

P waves, also called primary waves, are the first waves to be registered on a seismograph. The S waves, or secondary waves, are the second and slower wave to register on the seismograph. When locating an earthquakes epicenter seismologists take the first reading of the P wave, and then take the reading from the S wave. At the station of where the earthquake was recorded, seismologists draw a large circle from where the earthquakes epicenter could be. TO exactly located the earthquakes epicenter there needs to be at least 3 dfferent staions where the earthquake hit to determine its epicenter using the S and P time interval. 

What are long sand ridges oriented nearly parallel to the prevailing wind called

longitudinal dunes

Why was Alfred wegeners idea that tidal forces might cause continental drift refuted as impossible

It would stop earth's rotation.

Showed that the tidal forces needed to move continents would stop earths rotation.

When p wave bend while traveling through earth's core what happen when arrive at the shadow zone

serveral minutes later than expected

When new rock is added to an oceanic ridge the magnetized strips on either side of the ridge are evidence of sea-floor spreading. This is because the rocks on the two sides of the ridge

are equal in width and polarity

What does running water while occurring infrequently in deserts do

does most of the erosional work.

In the desert environment the chemical weathering of rocks is generally reduced because

moisture is lacking and organic acids are scarce ;D

What was the reason wegeners continental drift hypothesis was rejected

His evidence was incorrect.

Tropical soils are generally poor and thin due to

Leanching

The trace that records an earthquake from seismic instruments is called a

magnitude

How do ancient glacial deposits in Africa India Australia and South America support the idea of continental drift

G

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