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science chap 11
eathquakes
Question | Answer |
---|---|
1.Plates often come together at a reverse fault? | True |
.Plates often come together at a strike slip fault? | False |
2.Rocks don't reach their elastic limit when stress and earth's crust becomes so great and an earthquake occurs? | False |
Rocks reach their elastic limit when stress in earth's crust becomes so great and earthquakes occus? | True |
3.Scientists use information from at least three seismographs to locate a earthquakes epicenter? | True |
Scientists use information from at least four seismographs to locate a earthquakes epicenter? | False |
4.Scientists have not been able to determine the structure of Earth's interior by noteing the change in the speed and path of seismic waves? | False |
Scientists are able to determine the structure of Earth's interior by noteing the change in the speed and path of seismic waves? | True |
5.The Richter scale is used by seimotologists to describe the magnitude of earthquakes? | True |
The Richter scale is used by seismographs to describe the magnitude of earthquakes? | False |
6.By placing heavy items on lower shelves you are making you home more seismic safe? | True |
By placing heavy items on top shelves you are making your home more seismic safe? | False |
7.San Andreas fault is not a strike-slip fault? | False |
San Andreas fault is a strike-slip fault? | True |
8.Secondary waves move through earth by causing particles in rocks to vibrate at right angles to the direction of the waves? | True |
Secondary waves move through earth by causing particles in rocks to vibrate at a 20 degree angle? | False |
9.Earthquake surface waves are not very destructive? | False |
Earthquake surface waves are the most destructive? | True |
10.The Epicenter is the radius of the circle siesmotologists draw on a map that is not equal to the distance from a station to the earthquake? | False |
The Epicenter is the radius of the circle seismotologists draw on a map that is equal to the distance from a station to the earthquake? | True |
11.An earthquake with a magnitude of 6.5 releases about 30 times as much energy as an earthquake that registers 5.5 on the richter scale? | True |
An earthquake with a magnitude of 7.5 releases about 20 times as much energy as an earthquake that registers 5.5 richter scale? | False |
12.Secondary waves keep going when they hit the liquid outer core and pass through the liquid? | False |
Secondary waves are stopped when the hit the liquid outer core and do not pass the liquid? | True |
13.Surface waves are the fastest seismic waves? | False |
Surface waves are the slowest seismic waves? | True |
14.Shaking from a earthquake can cause wet soil to be more liquid? | True |
Shaking from an earthquake can cause wet soil to dry up? | False |
15.The first waves to arrive at a seismograph station are primary waves? | True |
The last waves to arrive at a seismograph station are primary waves? | False |
16.An earthquake occurs when rocks break because of wind and the energy is released? | False |
An earthquake occurs when rocks break because of wind and the energy is released | True |
17.Moho discontinuity is the boundary between the lower mantle and the crust? | False |
Moho discontinuity is the boundary between the upper mantle and crust? | True |
18.The area where no seismic waves are 18.detected after they are released by an earthquake | -shadow zone |
19.the outermost layer of the earth- | lithosphere |
20.The farther apart primary,secondary ,and surface waves arrive ,the farther away the epicenter is? | True |
The less farther apart primary ,secondary,and surface waves arrive,the farther away the epicenter is? | False |
21.Secondary waves move through earth ,causing particles in rocks to move back and forth in the same direction? | False |
Primary waves move through earth .causing particles in rocks to move back and forth in the same direction? | True |
22.Tension creates strike-slip faults? | False |
Tension creates normal faults? | True |
23.Compression forces are present where earth's plates come together | True |
Compression forces aren't present where earth's plates come together? | False |
24.Rocks are subject to the force of tension where earth's plates spread apart? | True |
Rocks are subject to the force of tension where earth's plates come together? | False |
25.At a reverse fault , the rocks above the fault surface are down and over the rocks below the fault surface? | False |
At a reverse fault ,the rocks above the fault surface are forced up and over the rocks below the fault surface? | True |