What is the elastic rebound theory?

Earthquake Theory Flashcard

Flashcard
•
Science
•
11th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
The elastic rebound theory explains that earthquakes occur when stress builds up in rocks until they break, releasing energy in the form of seismic waves. It was first proposed by Reid following the 1906 San Francisco earthquake.
2.
FLASHCARD QUESTION
Front
What characterizes tsunamis?
Back
Tsunamis have relatively small amplitudes compared to their very long wavelengths, allowing them to travel across oceans with little loss of energy.
3.
FLASHCARD QUESTION
Front
What is the source of an earthquake called?
Back
The source of an earthquake is referred to as the focus.
4.
FLASHCARD QUESTION
Front
What is the average composition of the continental crust?
Back
The average composition of the continental crust most closely approximates that of granite.
5.
FLASHCARD QUESTION
Front
Which statement about the crust is NOT true?
Back
Oceanic crust is enriched in potassium, sodium, and silicon.
6.
FLASHCARD QUESTION
Front
What are seismic waves?
Back
Seismic waves are waves of energy that travel through the Earth, generated by the sudden breaking of rock in an earthquake.
7.
FLASHCARD QUESTION
Front
What is the difference between oceanic and continental crust?
Back
Oceanic crust is thinner and denser than continental crust, which is thicker and less dense.
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