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ES - Ch 8

Test Description: ES

Instructions: Answer all questions to get your test result.

1) An earthquake's magnitude is a measure of the

Asize of the seismic wave it produces Bdamage it causes Cnumber of surface waves it produces Damount of shaking it produces

2) What instrument records earthquake waves

ARichter scale Bseismogram Cbarometer Dseismograph

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

A20 times B100 times Cten times Dtwo times

4) Tsuamis are

Awaves that connot cause damage on land Balso know as tidal waves Cwaves that are produced by tidal forces Doften generated by movements of the ocean floor

5) A sucession of ocean waves set in motion by a submarine earthquake is called an

Aunderwater landslide Bliquefaction Ccompression wave Dtsunami

6) In areas where unconsolidated sediments are saturated with water, earthquakes can turn stable soil into a fluid process called

Atidal effect Bfault creep Cunderwater landslide Dliquefaction

7) A building that settles unevenly after an eathquake is evidence of

Aliquefaction Btsunami Cfault creep Dunderwater landslide

8) A tsunami can occur when there is verticle movement at a fault under

Aa mountain range Bsmall inland lake Cthe San Andreas fault Dthe ocean floor

9) Why do earthquakes often cause damaging fires

ALightening strikes are common during earthquakes BTsunamis from earthquakes generate enogh heat to start fires CEarthquake vibrations can break gas, water and electrical lines DMagma from deep underground escapes through faults

10) Which of the following is used in an attempt to aamake short range predictions of when earthquakes will occur

Aheight of the ocean waves after earthquakes Bchanges in the color of rocks near faults Cstrain in rocks near faults Dstudy of historical records

*select an answer for all questions

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