Worksheets!Earthquakes!
Total questions: 24
Worksheet time: 12mins
What is an earthquake?
caused by the movement of parts of the Earth's crust, its outermost layer.
underground rock suddenly breaks and there is rapid motion along a fault.
what happens when two blocks of the earth suddenly slip past one another.
What causes earthquakes?
Convergent boundary
underground rock suddenly breaks and there is rapid motion along a fault
The mantle
How do earthquakes cause damage
damage does not usually occur until the earthquake magnitude reaches somewhere above 4 or 5.
damage does not usually occur until the earthquake magnitude reaches somewhere above 4 or 5.
ground shaking, ground rupture, landslides, tsunamis, and liquefaction
Does the earth open up after an earthquake?
The earth does not crack open like the Grand Canyon.
ground shaking, soil liquefaction, landslides, fissures, avalanches, fires and tsunamis.
That's just a myth
Where do earthquakes occur?
Florida and North Dakota
along faults
Along the rim of the Pacific Ocean
Will there be aftershocks after earthquakes?
Most large earthquakes are followed by additional earthquakes, called aftershocks
there will certainly be aftershocks,
it is quite possible that people may feel more shocks.
it is quite possible that people may feel more shocks.
Can earthquakes be predicted
seismologists have gotten much better at forecasting earthquakes.
quake prediction is notoriously difficult.
earthquake prediction has never been achieved successfully in a way which could be repeated
Are certain areas of earth more active then others
the Circum-Pacific belt,
the Alpide belt,
the mid-Atlantic Ridge.
Earthquakes are more common in some parts of the world than others
Ring of Fire
What is the intensity of an earthquake
8.8 to 8.9
a number that characterizes the severity of ground shaking at that location by considering the effects ofthe shaking on people, on manmade structures, and on the landscape.
A seismograph is the primary earthquake measuring instrument.
Can people cause earthquakes?
Yes
No
What is magnitude
distance or quantity.
the great size or extent of something.
Is there a difference between magnitude and intensity?
No
yes
What is the maximum magnitude for an earthquake?
9.5
-1.0
1.0
8.3
At what magnitude do earthquakes begin to be felt?
6.3
4.5
2.5 or less
Do several magnitude scales exist
No
yes
How often do earthquakes occur
approximately 55 per day.
12,000-14,000 earthquakes a year around the world, or 35 a day
What was the greatest earthquake in world history
1964 Alaska earthquake
2011 Tōhoku earthquake
1960 Valdivia earthquake
2004 Indian Ocean Earthquake
How often do earthquake occur in Canada
each year more than 50 earthquakes occur that are strong enough to be felt by Canadians.
11 per day!
What is a seismograph
is the primary earthquake measuring instrument.
instrument that responds to ground noises and shaking such as caused by quakes, volcanic eruptions, and explosions.
drum rotates, and the weighted pen moves back and forth due to the motion of seismic waves.
What should I do in case of an earthquake?
Find a sturdy table or bathtub and cover it up with a mattress and cover your head
Run!
Duck and cover
Can houses withstand earthquakes
Yes
No
Depends on how tall and how sturdy the foundation is.
What do scientists do after earthquakes
Go eat lunch
Just nothing
record the waves generated by an earthquake.
What causes damage during earthquakes
The earth shaking and causes foundations to crumble
Budding swaying for fun witch causes them to crumble
What is the safest type of structure for a house
Japanese high-rise construction
Wood and steel
ductile buildings
