last test

Question 1

what are some examples of nondepletable energy resources?

Answer 1

wind
solar
geothermal
hydroelectricity

Question 2

what are the pros of hydroelectric dams?

Answer 2

• they don’t emit pollutants/greenhouse gasses
• water is renewable (little danger of running out)
• easy to maintain
• provides water, flood control, and agricultural use

Question 3

what are the cons of hydroelectric dams?

Answer 3

• costs a lot to build
• causes plant decay
• danger of flooding in the area

Question 4

what is biomass?

Answer 4

Biomass is biological material derived from living, or recently living organisms.

Question 5

what is passive solar?

Answer 5

the use of the sun’s energy for the heating and cooling of living spaces

Question 6

what is active solar?

Answer 6

a system that uses energy from the sun to move water or air with pumps or fans

Question 7

what are potentially renewable resources?

Answer 7

Potentially renewable resources are renewable resources that require special attention and management in order to sustain their renewal for human use (renewable as long as we don’t use them more quickly than they can be replenished)

Question 8

what is energy conservation?

Answer 8

Reduction in the amount of energy consumed in a process or system, or by an organization or society, through the economy, elimination of waste, and rational use.

Question 9

what is peak demand?

Answer 9

the maximum load carried during a given period

Question 10

what is E-85?

Answer 10

E85 is a blend of 85% ethanol and 15% gasoline. It is the most commonly available blended fuel for use in flex-fuel vehicles

Question 11

what are some examples of solar energy systems?

Answer 11

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Question 12

what are the pros of using solar energy?

Answer 12

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Question 13

what are the cons of using solar energy?

Answer 13

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Question 14

what are some examples of biofuels?

Answer 14

Dried manure, charcoal and wood are examples of Solid biofuels. ethonal is the main one.

Question 15

what are some methods the government could employ to encourage people to conserve energy?

Answer 15

• tax energy sources (direct)
• public transportation (indirect)
• tax credits for buying and installing energy conserving stuff (insulation, furnaces, windows, and doors)

Question 16

only about _______ of the energy in coal is turned into electricity

Answer 16

1/3

Question 17

the fact that only some of the energy in coal is turned into electricity is a result of what law?

Answer 17

2nd law of thermodynamics

Question 18

what ideas are used in passive solar design?

Answer 18

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Question 19

what are the pros of using charcoal?

Answer 19

• its lighter
• twice as much energy per unit
• better than wood

Question 20

what are the cons of using charcoal?

Answer 20

-expensive

Question 21

Ethanol

Answer 21

• produced from corn and sugar cane
• U.S. is the largest producer
• Brazil is 2nd

Question 22

what can you use to make biodiesel?

Answer 22

processed vegetable oil

Question 23

the efficiency of hydroelectric systems depends on ____________ and ___________.

Answer 23

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Question 24

how is electricity generated from water?

Answer 24

When a dam is used to generate energy, tunnels are installed in the dam when it is built. These tunnels are lined with turbines which are turned when water flows through the tunnels. As the turbines turn, they create electricity which can be fed into the grid or stored.

Question 25

what are two hydroelectric systems? describe

Answer 25

1.

2.

Question 26

for the two hydroelectric systems, describe two positive and two negative things

Answer 26

Pros:

Question 27

describe 3 ways you can conserve energy in your daily life

Answer 27

1. turn down the thermostat in cold months so the heater isn’t always running to bring the temp up.
2. turn off lights and electronics when not in use to save electricity.
3. consolidate errands to reduce miles, by staying in the area you will not drive as far and it will save gas and miles.