III. Study the definitions

Petroleum – A fuel found in mineral deposits under the ground. Petr – comes from the Greek word for rock. Oleum from the Greek word for oil – therefore, rock oil, or oil found in rock.

Crude Oil – Oil or petroleum as it comes from the ground. It is not commercially usable in this from.

Bulge – Place where a swelling or curve shows; temporary increase in volume or numbers.

Seismologist – Scientist studing earthquakes.