Exam 22: Resources

Although technically not coal, the first material to form in the coal cycle is ___.

Phosphate is produced from _____.

Uranium is found in ________.

Because natural gas is less denser than oil it accumulates on the top of the oil.

Salt domes account for most of the petroleum reserves in the U.S. midcontinent.

The major iron ore minerals are _____.

Hydrocarbons must be heated to break down into simpler molecules useful to humans.

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 ________

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

At the current rate of consumption, United States recoverable coal reserves will be exhausted in ______ years.

Most of the easily recoverable uranium in the United States is found in sandstone in New Mexico, Utah, and Colorado.

The _____ resources include building stones and road gravels.

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.

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

Hydrothermal fluids are the most important source of metallic ore deposits.

In 1900 more than _____ percent of America's energy needs were satisfied by burning coal.

____ resources enable us to create the metals used in our world today.

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

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

The petroleum window is the depth between ______ to ______ feet through which sapropel must pass to transform into oil.