Exam 21: Geologic Resources

Once oil is formed it must accumulate in concentrations that can be drilled and pumped,these concentrations are called ________.

Petroleum,natural gas and propane are all considered _____ because they formed from the buried remains of plants and animals that lived millions of years ago.

______ is the initial stage in the development of coal.

Most geologic resources are renewable.

The more carbon,the more combustible (economically desirable)the coal.

The energy return on energy invested (EROEI)for newly discovered oil fields was typically around 100:1 in 1940s and it has currently decreased to ________

Aluminum ore is the product of direct chemical precipitation from seawater.

Gas hydrate contains ____.

Oil sands are actually asphalt-cemented sand or sandstone deposits.

The United States has enormous quantities of oil in __.

Counting tar sands,_______ has the second largest oil reserves in the world.

Phosphate is produced from _____.

Most geologic resources are ____,they form very slowly and are extracted much faster than nature replaces them.

Ores are naturally occurring materials that can be mined profitably.

Over 60% of the world's oil comes from exploitation of oil fields in the Middle East.

Economic deposits of petroleum require _____.

A resource is any geologic material that has yet to be discovered.

Pencil lead is made of _____.

New oil is born where _____.

Gold is found in ____.