NEW
Font size
WorksheetsEarthquakes
Total questions: 30
Worksheet time: 15mins
In earthquake terminology, how is a focus described?
Energy of an earthquake carried away from the epicenter.
The point beneath the Earth's surface where rock under stress breaks to cause an earthquake.
The point on the surface directly above the origin of the earthquake.
What are the different kinds of seismic waves?
Q, R, and S waves
R, S, and surface waves
P, S, and surface waves
How can the epicenter of an earthquake be characterized?
A measurement of an earthquake's magnitude and its strength based on seismic waves and movement.
The point on the Earth's surface directly above the focus.
The point beneath the Earth's surface where rock under stress breaks to cause an earthquake.
How does the energy of an earthquake travel through the Earth?
Seismic waves carry the energy of an earthquake away from the focus, through the Earth's interior, and across the surface.
Seismic waves carry the energy of an earthquake toward the focus, through the Earth's interior, and across the surface.
During an earthquake, seismic waves move toward the focus and epicenter then move out in all directions.
________ carry the energy of an earthquake away from the focus.
Mercalli waves
Richter waves
Seismic waves
When considering the three types of seismic waves, which waves move more slowly than their counterparts yet produce the most severe ground movements?
P waves
S waves
surface waves
These type of waves compress and expand the ground like an accordion.
P waves
S waves
surface waves
Which waves vibrate from side to side and up and down?
P waves
S waves
surface waves
When P and S waves reach the surface of the Earth, some are transformed into surface waves.
True
False
What instrument is used to measure and record the vibrations of seismic waves?
Richter graph
Seismograph
Mercalli graph
An earthquake's ___________ is a measurement of its strength based on seismic waves and movement along faults.
Energy
Intensity
Magnitude
How many rating scales are used to measure earthquakes?
2
3
5
This rating scale rates earthquakes according to the size of seismic waves as measured by a seismograph.
Moment magnitude scale
Mercalli scale
Richter scale
What earthquake rating scale rates earthquakes by describing their effects on people, buildings, and the land surface in a given location?
Moment magnitude scale
Mercalli scale
Richter scale
This scale rates earthquakes by estimating the total energy released.
Moment magnitude scale
Mercalli scale
Richter scale
Which earthquake rating scale can be used to rate earthquakes of all sizes, near or far?
Moment magnitude scale
Mercalli scale
Richter scale
Rank the seismic waves in order of appearance when an earthquake first occurs as measured by a seismograph.
S waves, P waves, then surface waves
P waves, S waves, then surface waves
S and P waves at the same time, then surface waves
When an earthquake strikes, the farther away the epicenter is, the greater the difference between the two arrival times of P and S waves.
True
False
Typically, three different seismograph stations are used to plot circles on a map with each circle showing the distance from one station to all the points where the epicenter could be.
The farthest circle from all the seismographs is the epicenter location.
The single point where the three circles intersect is the epicenter location.
The closest point to the first seismograph that registered is the epicenter location.
The time difference for the arrival of P and S waves at a seismograph tells scientists what information?
How far from the seismograph the epicenter is.
How far deep in the earth the origin of the focus is.
The magnitude of the earthquake.
An earthquake can be defined as the sudden shaking of the __________.
Oceanic crust
Lithosphere
Inner core
The earth's crust may at first bend and when the stress force exceeds the strength of the rock, it changes and breaks. The process of breaking results in seismic waves.
True
False
The break in the Earth's crust where slabs of crust slip past each other is called a _______.
Tectonic plate
Lithosphere break
Fault
What is the point beneath the Earth's crust where rocks first break under stress causing an earthquake?
First seismic surface wave
Epicenter
Focus or hypocenter
Seismic waves are best described as :
Energy
Vibrations
Forces
Which seismic waves make the ground roll like ocean waves causing buildings to sway from side to side?
S waves
P waves
Surface waves
The most likely causes of earthquakes are :
The breaking of the lithosphere
The slipping or interacting of tectonic plates
Magma and energy release from the inner core of the earth
In a normal fault, a hanging wall moves upward along the fault.
True
False
Which diagram is an example of a strike-slip fault?
Which diagram is an example of a reverse fault?
