Part 2

Question 1

_____is a measure of how much energy that is put into a system actually does useful work

Answer 1

energy efficiency

Question 2

_______is the amount of energy a source can provide after the energy used to extract, process, and transport the source has been subtracted

Answer 2

Net energy

Question 3

Moving towards a more sustainable energy future involves ______

Answer 3

decentralizing power systems, energy conservation, more renewables

Question 4

If you live in a place that gets its electricity from a hydropower plant, it is better to drive an _____car

Answer 4

electric

Question 5

Electricity generated through moving water

Answer 5

hydroelectricity

Question 6

______is reducing the amount of energy used

Answer 6

energy conservation

Question 7

Sand and clay particles that contain bitumen are_______

Answer 7

oil sand

Question 8

A device that uses hydrogen and oxygen to produce electricity

Answer 8

fuel cell

Question 9

_____can produce methane gas emissions

Answer 9

hydroelectricity

Question 10

A mixture of rock and hydrocarbons that can be burned directly is_____

Answer 10

oil shale

Question 11

the fastest-growing type of renewable energy that can be used to generate electricity for a power plant or for individual homes

Answer 11

solar power:_______

Question 12

In nuclear power,______are used to generate the nuclear chain reaction.

Answer 12

neutrons

Question 13

A fossil fuel that is a mixture of methane and other gases is ______

Answer 13

natural gas

Question 14

According to the EPA, the most efficient way to cool or heat homes is through_____

Answer 14

geothermal heat pumps

Question 15

Which of these shows net energy from greatest to least

Answer 15

hydroelectric, coal, wind, nuclear, PV cells

Question 16

____: moderate to high net energy and can be used on existing farmlands, but can be dangerous to birds and is not always reliable

Answer 16

wind

Question 17

______is a biofuel that could replace gasoline in cars and is often made from corn in the United States

Answer 17

ethanol

Question 18

______: relatively safe, reliable way to generate electricity, but produces hazardous waste and has low net energy

Answer 18

nuclear power

Question 19

A liquid, dark fossil fuel made mostly of hydrocarbons is ______

Answer 19

petroleum

Question 20

Ancient plant life in a rock form that is easily burned is ______

Answer 20

coal

Question 21

An ice-like solid that contains both methane and water is _______

Answer 21

methane hydrate