Energy Test Review

Coal is, by far, the dirtiest of all fossil fuels.

• true

• false

Photovoltaic cells do not produce any of the greenhouse gas emissions associated with electricity generated

by the combustion of fossil fuels.

• true

• false

A hydrogen fuel cell mixes hydrogen with gasoline to increase fuel economy.

• true

• false

Which of the following is true of hydropower?

I. It is the most expensive renewable energy source

II. It is the world’s leading renewable energy source for electrical production

III. It is the most recently developed renewable energy source

• I only

• II only

• III only

• I & II only

Approximately three-fourths of the world’s tar sands resources are located in which country?

• US

• Canada

• Ukraine

• Russia

Plutonium has an approximate half-life of 24,000 years. If the spent fuel rod is composed of 200 grams of plutonium, approximately how many years will elapse for that same fuel rod to only contain 25 grams of plutonium?

• 24,000 years

• 48,000 years

• 72,000 years

• 96,000 years

Which of the following is true of geothermal heat pumps?

• They utilize heat that is stored

  thousands of meters below the earth’s surface

• They utilize heat that is stored 3-6 meters below the earth’s surface

• They are only usable in locations

  with a large amount of seismic activity

• they are used to generate electricity

Which characteristic is a disadvantage of hydroelectric plants?

• low net energy

• high-cost electricity

• high emissions of carbon dioxide

• large land disturbance

Coal is formed from

• hydrothermal deposits

• one million year old marine

  deposits

• 300 to 400 million year old plant remains

• solidified oil deposits

The technology called ____ involves removing CO₂ from the smokestacks of coal-burning and industrial power plants in order to isolate it from the environment

• coal gasification

• coal capture and sequestration

• hydrofracking

• refining