What is responsible for most of the damage buildings suffer during earthquakes?
Earthquake Risks

Flashcard
•
Science
•
7th Grade
•
Hard
Rajinder Vasamsetti
FREE Resource
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23 questions
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1.
FLASHCARD QUESTION
Front
Back
liquefaction
Answer explanation
Liquefaction occurs when saturated soil loses strength during an earthquake, causing buildings to sink or tilt. This phenomenon is responsible for much of the structural damage observed in seismic events.
2.
FLASHCARD QUESTION
Front
The larger the force applied to a fault, the smaller the chance of a large earthquake.
Back
False
Answer explanation
The statement is false because a larger force applied to a fault increases the likelihood of a large earthquake occurring, as it can overcome the friction holding the fault together.
3.
FLASHCARD QUESTION
Front
How much more of a magnitude is a 7 earthquake than a magnitude 4 earthquake on the Richter scale?
Back
1000 times
Answer explanation
A magnitude 7 earthquake is 10^3 (1000) times more powerful than a magnitude 4 earthquake, as each whole number increase on the Richter scale represents a tenfold increase in ground motion.
4.
FLASHCARD QUESTION
Front
When force on rocks is great enough they break, producing vibrations called: faults, liquefaction, earthquake, tsunami
Back
earthquake
Answer explanation
When rocks experience significant force, they fracture, causing vibrations known as earthquakes. This term specifically refers to the seismic activity resulting from the breaking of rocks, making it the correct answer.
5.
FLASHCARD QUESTION
Front
Richter Scale and Moment Magnitude measure what?
Back
energy of the earthquake
Answer explanation
The Richter Scale and Moment Magnitude both quantify the energy released during an earthquake, making 'energy of the earthquake' the correct choice. The other options do not relate to the measurement of earthquake magnitude.
6.
FLASHCARD QUESTION
Front
Mercalli Scale measures ____________________ in an earthquake.
Back
damage to structures and people
Answer explanation
The Mercalli Scale measures the intensity of an earthquake based on its observed effects, specifically the damage to structures and people, rather than the physical tremors or phenomena like liquefaction.
7.
FLASHCARD QUESTION
Front
Earthquakes occur along
Back
faults and tectonic plate boundaries
Answer explanation
Earthquakes primarily occur along faults, which are fractures in the Earth's crust, and at tectonic plate boundaries where plates interact. Therefore, the correct answer is 'faults and tectonic plate boundaries'.
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