Exam 17: Earths Interior and Geophysical Properties

The gradual loss of heat through the Earth's surface is called ___.

The P-wave shadow zone can be explained by the refraction of P-waves at the ___.

_____ is a circulation pattern in which low-density material rises and high-density material sinks.

A gravity reading lower than the normal regional gravity indicates that a region is ____.

Geologists study the composition of the Earth's crust using deep drill holes.

Seismic P-waves _____ through continental crust relative to oceanic crust.

The average heat flow of the continents is the same as the average heat flow of the sea floor.

___ indicates that the core of the Earth is a liquid.

Seismic waves travel faster in oceanic crust than in continental crust.

The Earth's core is made up of equal parts cobalt and iron.

The magnetic poles are displaced about ______ degrees from the geographic poles.

A gravity meter registers _____ over ore bodies.

_____ is the return of some of the energy of a seismic wave to the Earth's surface after it bounces off a rock boundary.

The asthenosphere may be a partially melted crystal and liquid slush.

Generally, seismic wave velocity decreases with depth.

Iron-nickel meteorites are an important source of information regarding the composition of Earth's ______.

The composition of the upper mantle is the ultramafic rock peridotite.

The crust and upper mantle form the ____.

A region held down out of isostatic equilibrium produces a negative gravity anomaly.

_______ is a balance or equilibrium of adjacent blocks of brittle crust floating on the upper mantle.