Exam 5: Earthquakes and Earths Interior

The thickness of the crust beneath the continents averages _______.

P-waves travel by compression-expansion.

The S-wave shadow zone is an area of the planet that does not receive any S-waves,usually on the opposite side of the origin of the earthquake.

The temperature at which magnets lose their magnetism is known as the _______.

The deepest mine in the world plunges to a depth of _______.

The strength of an earthquake can also be called the _______ of the earthquake.

A seismic wave that travels by alternating pulses of compression and expansion is known as a _______wave.

Iron meteorites,stony-iron meteorites,and some stony meteorites have roughly the same composition as our planet.

Measurements on the Modified Mercalli Intensity Scale range from _______.

Secondary hazards sometimes cause more damage than the earthquake itself.

The diagram below shows a secondary earthquake hazard.

According to the figure below,what is the approximate S-P travel time?

An instrument that measures and detects vibrations in Earth is known as a _______.

According to the figure below,discuss the differences between P-wave and S-wave velocities.

A place along a fault where an earthquake has not occurred in a long time is called paleoseismology.

The _______ scale is a logarithmic scale that assigns a number to quantify the amount of seismic energy released by an earthquake.

The area inside the Earth where rock begins to melt is known as the _______.

The Richter Scale measures the damage caused by a given earthquake.

In the figure below,what is the approximate speed of S-waves at the 670km discontinuity?

When olivine is squeezed to pressures equal to that at depths of several hundred kilometers,polymorphs of olivine form.