Calcite (CaCO3) is in which mineral class?

The Moho ________.

The image below shows a mineral specimen of quartz. What is the term for the smoothly curving, clamshell-shaped surface on the sample below?

Which earthquake scale measures the amplitude of deflection of a seismograph pen, standardized to an idealized distance of 100 km between the epicenter and the seismograph?

An important contribution made by Copernicus is his (correct) assertion that the ________.

Which of these parts of the deep-ocean floor is flat and nearly featureless?

________ is a mineral property defined by the density of the mineral sample divided by the density of water (1.0 g/cm3).

In the figure provided below, what type of igneous intrusion is the vertical rock unit shown by letter A?

In the geologic past, the polarity of the Earth’s magnetic field is ________.

The figure below shows a road in Death Valley, California, curving around a(n) ________.