Author: Anonymous

Fossils that are useful in correlating rock layers are called

Most of the active volcanoes are located in an area along the margins of the Pacific Ocean known as the _____________.

A naturally occurring, crystalline, inorganic element or compound that possesses a fairly definite chemical composition and a distinctive set of physical properties is called a(n) ________________.

Most, but not all, geologists believe the Earth’s age to be about______________ years.

The Richter scale for the severity of earthquakes has magnitudes expressed in whole numbers, usually between 3 and 9, but since it is a logarithmic scale, each whole-number step represents about _________ times more energy than the preceding whole-number step.

Most earthquake damage is caused by

Hardness is also a property used for classification of minerals using the Mohs scale. Which of the following is the softest mineral?

The lowest places on Earth’s surface are called __________ trenches.

Which of the following radionuclides has the shortest half-life?

The modern geological theory that considers the Earth’s lithosphere to be made up of a series of solid sections or segments that are constantly interacting with one another in very slow motion is known as _____.