SCIENCE: History of the Earth Review

Front

What is Original Horizontality?

Back

The principle that sedimentary rocks are deposited in horizontal layers parallel to the Earth's surface.

Front

What causes tectonic plates to move?

Back

Convection currents in the mantle.

Front

What are Eons divided into in the geologic time scale?

Back

Eras.

Front

What is permineralization?

Back

The process where minerals replace the remains of an organism.

Front

What is amber?

Back

A type of fossil that is tree sap hardened and replaced by minerals.

Front

What is weathering?

Back

The process of breaking down rocks and minerals through natural forces.

Front

What is erosion?

Back

The process of moving weathered rock and soil from one location to another.

Front

What is relative dating?

Back

A method of determining the age of rocks and fossils by comparing them to other rocks and fossils.

Front

What is an unconformity?

Back

A gap in the geologic record that indicates a period of erosion or non-deposition.

Front

What are fossils?

Back

Remains or traces of ancient organisms preserved in rock.