Earthquake

Question 1

Stress

Answer 1

A force that acts on rock to change its shape or volume

Question 2

Tension

Answer 2

when two plates pull apart

Question 3

compression

Answer 3

when two plates come together

Question 4

shearing

Answer 4

when two plates slip past each other

Question 5

normal fault

Answer 5

when rock in pulled apart by tension

Question 6

reverse fault

Answer 6

when compression pushes the faults together

Question 7

strike-slip fault

Answer 7

when shearing pushes 2 plates by each other

Question 8

plateau

Answer 8

a large high lifted land above sea level

Question 9

earthquake

Answer 9

a shaking and trembling the results from movement of rock beneath the earth’s surface

Question 10

focus

Answer 10

the area beneath the earth’s surface where rock that was under stress breaks and moves

Question 11

epicenter

Answer 11

the point directly below the focus

Question 12

P waves

Answer 12

the first waves to arrive called primary waves that vibrate up and down

Question 13

S waves

Answer 13

seismic waves the come secondary and vibrate side to side

Question 14

surface waves

Answer 14

slower waves that compress and expand the ground

Question 15

seismograph

Answer 15

an instrument that records and measures an earthquake’s seismic waves

Question 16

Modified Mercalli Scale

Answer 16

the amount of shaking from an earthquake recorded by the peoples observasions

Question 17

magnitude

Answer 17

a single number that geoligists assign to an earthquake based on the earthquakes size

Question 18

Richter scale

Answer 18

the earliest magnitude scale

Question 19

moment magnitude scale

Answer 19

an instrument that rates the total energy an earthquake releases

Question 20

seismogram

Answer 20

the record of an earthquake’s seismic waves

Question 21

Folding

Answer 21

we rock folds under stress but doesn’t breaks and forms anticlines and synclines

Question 22

anticlines

Answer 22

when rock bends downward

Question 23

synclines

Answer 23

when rock bends upward

Question 24

Liquefaction

Answer 24

turning a solid into a liquid and bringing the substances up and with the air pipes in them they rise and the heavy stuff sinks down.

Question 25

fault block mountains

Answer 25

formed when tension drops down relative to other blocks