Exam 16: Understanding Earths Resources

The original source of petroleum is ocean _____.

Which of the following alternatives to fossil fuels is NOT a renewable resource?

Placer mineral deposits,such as shown in the figure below,CANNOT be found in one of the following sites:

In the nuclear chain reaction of Uranium-235,illustrated below,each nucleus releases two_____.

Fuel cells,which are battery-like devices that use renewable energy sources,are fueled with ______.

Coal-bearing strata in the Appalachian,Illinois and Western Interior coal basins,as shown on the map below,include up to 60 layers of coal,which miners term _____.

Wind and solar power are fossil fuels.

What are the ranks of coal,and how do they differ in general?

Petroleum deposits form in lake and river sediments.

Ninety percent of the silver produced in the United States is produced as a by-product of _____ mining.

Geothermal energy is produced inside Earth by _____.

In general,most living resources are _____.

Which of the following is a category of mineral deposit that produces gold from gravel?

The most important natural resources are water,soil,and _______.

Nuclear energy is NOT technically renewable,but the resources are so long-lasting that it may be considered ______.

What types of metallic mineral ores may be found in magmatic arc deposits (in the position shown in the figure below)?

Both _____ and hydrothermal ore deposits typically form at present or past plate boundaries.

Why should we be concerned about future mineral resources?

There are now at least _____ billion humans on Earth.

How does chromite form in magmatic ore deposits?