Earthquake Theory Flashcard

Earthquake Theory Flashcard

Assessment

Flashcard

Science

11th Grade

Hard

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15 questions

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1.

FLASHCARD QUESTION

Front

What is the elastic rebound theory?

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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