Relative to the Oldest Rocks That Have Been Found on the Earth

question 33

Multiple Choice

Relative to the oldest rocks that have been found on the earth, the oldest lunar rocks are

• A) very much younger.
• B) somewhat younger.
• C) about the same age.
• D) older.

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Definitions:

Auricles

Auricles, in anatomy, primarily refer to the external part of the ear; however, they can also denote ear-like extensions or appendages in other organs, such as the atria of the heart.

Serous Membrane

A smooth tissue membrane consisting of two layers of mesothelium, which secrete serous fluid to lubricate and reduce friction between tissue layers.

Aortic Semilunar Valves

Valves located between the aorta and the left ventricle of the heart that prevent blood from flowing back into the heart.

Great Cardiac Veins

The great cardiac veins are large veins on the surface of the heart that drain blood from the heart muscle.