QUESTION 1

Which of the following substances is commonly used in a geothermal system?
Isobutane
Hydrogen sulfide
Radioactive waste
Liquid nitrogen

QUESTION 2
Hydropower pollutes the water it uses for energy.
True
False

QUESTION 3
Which of the following statements is true of an enhanced geothermal system?
It needs very hot water to work.
It is also known as a "hot dry rock" system.
It is an open-loop system.
It is built directly over hot spots.

QUESTION 4
How much water does a geothermal plant use for every megawatt hour produced?
None
50 gallons
4,000 gallons
10,000 gallons

QUESTION 5
Geothermal energy needs water to work.
True
False

QUESTION 6
What city was created by the construction of the Hoover Dam?
Boulder City
Boulder Canyon
St. Thomas
Grand Coulee

QUESTION 7
How many homes will enhanced geothermal systems be able to power by 2050?
1,400
150,000
7 million
250 million

QUESTION 8
Hydropower alone can supply the world's electricity needs.
True
False

QUESTION 9
Which of the following statements is true of a binary cycle system?
It works best if with water above 400°F.
It works only with open-loop systems.
It works best with water below 400°F.
It is still experimental.

QUESTION 10
Which of the following statements is true of water used for geothermal systems?
It flows over a turbine.
It sometimes contains contaminants.
It is the same ground water used by the surrounding community.
It causes acid rain.

QUESTION 11
What is the average temperature of magma?
500°F
2000°F
5000°F
10,000°F

QUESTION 12
How many years did the Hoover Dam close to tourists after the German plot to bomb it in 1939?
1
6
8
12

QUESTION 13
Hydropower is cheaper than coal-powered plants because hydropower has achieved economies of scale.
True
False

QUESTION 14
In a hydroelectric power plant, where is the water stored before being released to power a turbine?
In the intake
In the powerhouse
In the penstock
In the water reservoir

QUESTION 15
Some geothermal power plants cause acid rain.
True
False