Question 1

Energy use per person in the United States today occurs at a rate of about

Accepted Answer

A) 1.1 kW. 
B) 11 kW. 
C) 110 kW. 
D) 1.1 MW. 
A) 1.1 kW. 
B) 11 kW. 
C) 110 kW. 
D) 1.1 MW. B

Question 2

It seems possible that a serious effort to improve the efficiency of electricity use in the United States could reduce its consumption of electric energy by

Accepted Answer

A) 5 percent. 
B) 10 percent. 
C) 25 percent. 
D) 50 percent. 
A) 5 percent. 
B) 10 percent. 
C) 25 percent. 
D) 50 percent. D

Question 3

One or more factors that today prevent the widespread use of hydrogen as a fuel is/are

Accepted Answer

A) the need to first separate hydrogen from its chemical compounds, such as water. 
B) the carbon dioxide produced when it combines with oxygen. 
C) the amount of energy liberated when it combines with oxygen. 
D) the difficulty of storing and shipping it. 
E) Both A and D 
A) the need to first separate hydrogen from its chemical compounds, such as water. 
B) the carbon dioxide produced when it combines with oxygen. 
C) the amount of energy liberated when it combines with oxygen. 
D) the difficulty of storing and shipping it. 
E) Both A and D E

Question 4

Which of the following statements is not true?

Accepted Answer

A) Coal-fired power plants in the United States produce over half of its electricity. 
B) About 150 new coal-fired power plants are newly built or under construction in the United States. 
C) The United States has less than 5 percent of the world's coal reserves. 
D) Coal is cheaper per unit of energy released when it is burned than any other fossil fuel. 
A) Coal-fired power plants in the United States produce over half of its electricity. 
B) About 150 new coal-fired power plants are newly built or under construction in the United States. 
C) The United States has less than 5 percent of the world's coal reserves. 
D) Coal is cheaper per unit of energy released when it is burned than any other fossil fuel.

Question 5

The proportion of world energy supplied by sources other than fossil fuels is about

Accepted Answer

A) 15 percent. 
B) 25 percent. 
C) 50 percent. 
D) 85 percent. 
A) 15 percent. 
B) 25 percent. 
C) 50 percent. 
D) 85 percent.

Question 6

The earth's atmosphere is mainly heated by

Accepted Answer

A) visible light radiated by the sun. 
B) infrared light radiated by the sun. 
C) infrared light radiated by the earth. 
D) hot exhaust gases from burning fossil fuels. 
A) visible light radiated by the sun. 
B) infrared light radiated by the sun. 
C) infrared light radiated by the earth. 
D) hot exhaust gases from burning fossil fuels.

Question 7

Energy use per person in the United States today is

Accepted Answer

A) about the same as the world average. 
B) about 10 percent more than the world average. 
C) about one and a half times the world average. 
D) about four times the world average. 
A) about the same as the world average. 
B) about 10 percent more than the world average. 
C) about one and a half times the world average. 
D) about four times the world average.

Question 8

The energy the world uses in a year is comparable with the energy that arrives from the sun every

Accepted Answer

A) hour. 
B) day. 
C) week. 
D) month. 
A) hour. 
B) day. 
C) week. 
D) month.

Question 9

The renewable energy source that seems to have the most worldwide potential is

Accepted Answer

A) wind. 
B) geothermal. 
C) hydropower. 
D) solar. 
A) wind. 
B) geothermal. 
C) hydropower. 
D) solar.

Question 10

The world's fastest-growing source of clean energy is

Accepted Answer

A) wind. 
B) geothermal. 
C) hydropower. 
D) solar. 
A) wind. 
B) geothermal. 
C) hydropower. 
D) solar.

Question 11

Of the following greenhouse gases, the most and least important are respectively

Accepted Answer

A) carbon dioxide. 
B) CFC and HCFC refrigeration gases. 
C) nitrous oxide. 
D) methane. 
E) Both A and C 
A) carbon dioxide. 
B) CFC and HCFC refrigeration gases. 
C) nitrous oxide. 
D) methane. 
E) Both A and C

Question 12

In the past century the world's population has increased by about

Accepted Answer

A) 10 percent. 
B) 50 percent. 
C) 100 percent. 
D) 300 percent. 
A) 10 percent. 
B) 50 percent. 
C) 100 percent. 
D) 300 percent.

Question 13

Methane is the chief constituent of

Accepted Answer

A) natural gas. 
B) gasoline. 
C) diesel fuel. 
D) ethanol. 
A) natural gas. 
B) gasoline. 
C) diesel fuel. 
D) ethanol.

Question 14

Which statement(s) apply(ies) to nuclear fusion?

Accepted Answer

A) It is the energy source of the sun and stars. 
B) On the earth, its fuel supply is limited. 
C) It should produce relatively little radioactive waste. 
D) It has not yet produced energy in the laboratory. 
E) Both A and C 
A) It is the energy source of the sun and stars. 
B) On the earth, its fuel supply is limited. 
C) It should produce relatively little radioactive waste. 
D) It has not yet produced energy in the laboratory. 
E) Both A and C

Question 15

The proportion of the world's electricity that comes from nuclear energy is about

Accepted Answer

A) 1/20. 
B) 1/6. 
C) 1/3. 
D) 1/2. 
A) 1/20. 
B) 1/6. 
C) 1/3. 
D) 1/2.

Question 16

Energy not ultimately derived from solar radiation is found in

Accepted Answer

A) tides. 
B) waves. 
C) falling water. 
D) wind. 
A) tides. 
B) waves. 
C) falling water. 
D) wind.

Question 17

Most oil today is used for

Accepted Answer

A) transportation. 
B) electricity. 
C) heat. 
D) chemical products. 
A) transportation. 
B) electricity. 
C) heat. 
D) chemical products.

Question 18

Fuel cells

Accepted Answer

A) store energy. 
B) need regular recharging with electric current. 
C) need continuous supplies of fuel. 
D) produce hydrogen from water. 
A) store energy. 
B) need regular recharging with electric current. 
C) need continuous supplies of fuel. 
D) produce hydrogen from water.

Question 19

In a good wind, a modern large wind turbine might have a power output of

Accepted Answer

A) 2 kW. 
B) 20 kW. 
C) 200 kW. 
D) 2000 kW. 
A) 2 kW. 
B) 20 kW. 
C) 200 kW. 
D) 2000 kW.

Question 20

If present trends in population and greenhouse gas emissions continue, the earth's surface temperature will increase by a catastrophic 4$\circ$C by the year

Accepted Answer

A) 2020. 
B) 2050. 
C) 2100. 
D) 2500. 
A) 2020. 
B) 2050. 
C) 2100. 
D) 2500.

Energy use per person in the United States today occurs at a rate of about

It seems possible that a serious effort to improve the efficiency of electricity use in the United States could reduce its consumption of electric energy by

One or more factors that today prevent the widespread use of hydrogen as a fuel is/are

Which of the following statements is not true?

The proportion of world energy supplied by sources other than fossil fuels is about

The earth's atmosphere is mainly heated by

Energy use per person in the United States today is

The energy the world uses in a year is comparable with the energy that arrives from the sun every

The renewable energy source that seems to have the most worldwide potential is

The world's fastest-growing source of clean energy is

Of the following greenhouse gases, the most and least important are respectively

In the past century the world's population has increased by about

Methane is the chief constituent of

Which statement(s) apply(ies) to nuclear fusion?

The proportion of the world's electricity that comes from nuclear energy is about

Energy not ultimately derived from solar radiation is found in

Most oil today is used for

Fuel cells

In a good wind, a modern large wind turbine might have a power output of

If present trends in population and greenhouse gas emissions continue, the earth's surface temperature will increase by a catastrophic 4^$\circ$C by the year

The Scientific Method

Motion

Energy

Matter and Heat

Electricity and Magnetism

Waves

The Nucleus

The Atom

The Periodic Law

Crystals, Ions, and Solutions

Chemical Reactions

Organic Chemistry

Atmosphere and Hydrosphere

The Rock Cycle

The Evolving Earth

The Solar System

The Stars

Universe

Filters

Exam 4: Energy and the Future

Energy use per person in the United States today occurs at a rate of about

It seems possible that a serious effort to improve the efficiency of electricity use in the United States could reduce its consumption of electric energy by

One or more factors that today prevent the widespread use of hydrogen as a fuel is/are

Which of the following statements is not true?

The proportion of world energy supplied by sources other than fossil fuels is about

The earth's atmosphere is mainly heated by

Energy use per person in the United States today is

The energy the world uses in a year is comparable with the energy that arrives from the sun every

The renewable energy source that seems to have the most worldwide potential is

The world's fastest-growing source of clean energy is

Of the following greenhouse gases, the most and least important are respectively

In the past century the world's population has increased by about

Methane is the chief constituent of

Which statement(s) apply(ies) to nuclear fusion?

The proportion of the world's electricity that comes from nuclear energy is about

Energy not ultimately derived from solar radiation is found in

Most oil today is used for

Fuel cells

In a good wind, a modern large wind turbine might have a power output of

If present trends in population and greenhouse gas emissions continue, the earth's surface temperature will increase by a catastrophic 4 ∘\circ∘ C by the year

The Scientific Method

Motion

Energy

Matter and Heat

Electricity and Magnetism

Waves

The Nucleus

The Atom

The Periodic Law

Crystals, Ions, and Solutions

Chemical Reactions

Organic Chemistry

Atmosphere and Hydrosphere

The Rock Cycle

The Evolving Earth

The Solar System

The Stars

Universe

Filters

If present trends in population and greenhouse gas emissions continue, the earth's surface temperature will increase by a catastrophic 4^$\circ$C by the year