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GE101 - Exam 3 > Renewable Resources > Flashcards

Renewable Resources Flashcards

1
Q

What is Renewable Resources?

A

Natural resources that can be replenished in a short period of time.

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2
Q

What examples are renewable resources?

A

Solar
Wind
Water
Geothermal
Biomass

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3
Q

What is Solar Energy?

A

Energy from the sun.
Inexhaustible and nonpolluting
Ultimate origin of most forms of utilized energy

But has a chief drawback = diffuse and intermittent

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4
Q

What are the two types of solar energy use?

A

Hot water and space heating
Electricity generation

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5
Q

What are the processes of electricity generation?

A

Convert solar energy into thermal energy and then generate electricity

EX: Parabolic troughs

Photovoltaic (PV) cells
Convert solar energy directly into electrical energy

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6
Q

What is Geothermal?

A

Energy from Earth’s heat.

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7
Q

How is Geothermal energy generated?

A

By harnessing naturally occurring steam or hot water produced by water contact with heated rocks in the earth’s crust

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8
Q

Where is geothermal energy usually available?

A

At magmas that are near the surface.

EX: recent volcanic activity above subduction zones

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9
Q

What is geothermal energy used for?

A

Electricity generation, heating, and cooling.

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10
Q

What is wind energy?

A

Energy from the wind.

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11
Q

What can windmills do?

A

Turn turbines directly, do not use any fuel, can e built rather quickly

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12
Q

What does wind power need in order to operate?

A

strong steady winds

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13
Q

what are the advantages of wind power?

A

Does not pollute air or water
Does not deplete scarce natural resources

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14
Q

what is the technological advances in design for wind power?

A

Lowered cost of electricity generation

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15
Q

What are the disadvantages of wind power?

A

Unreliable and intermittent because energy can’t be easily stored.
Wind power is most plentiful in isolated areas but needs to build new transmission line to move stored energy.
Aesthetic become bad
Bad for birb

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16
Q

What is Biomass?

A

Energy from burning organic or living matter

17
Q

What are Biomass fuels made up of?

A

Organic materials produced by plants, animals, or microorganisms that can be burned directly as a heat source or converted into a liquid/gas

18
Q

Is Biomass fuels the most common renewable source of energy?

A

Yes

19
Q

What are the major sources of biomass?

A

Trees, grain, sugar crops, and oil-bearing plants
waste (crop residues, animal wastes, garbage, and human sewage)

20
Q

What is the source of most biomass energy?

A

Wood

21
Q

What is wood used for as the key source of energy in Biomass fuels?

A

Spaces heating
cooking
water heating
lighting

22
Q

What happen if we keep on depending on wood?

A

Forest go byebye

23
Q

What is Ethanol?

A

Alcohol produced from plants

24
Q

What are the disadvantages of corn over sugarcane?

A

Corn require high maintenance of good land, fertilizer, and control of pest.
Sugarcane can grow on marginal soils

corn requires a lot ofland

sugarcane is more energy efficient

sugar cheap

corn overrun soil and wildlife conservation

corn make food expensive if convert to fuel

25
Q

What is waste in terms of Biomass Fuels?

A

Using crops residues and human/animal refuse to make methane gas (biogas)

26
Q

What is Water/Hydroelectric Energy?

A

Energy from the flow of water

27
Q

What is the second most commonly used renewable energy source?

A

Hydropower/Hydroelectricity

28
Q

How does Hydropower exploit energy?

A

Through falling/flowing water to drive turbines

29
Q

What other features does Hydropower have?

A

Clean source of energy
Location-specific

30
Q

What countries account for more than half the worlds total production of Hydropower?

A

China
Brazil
Canada
USA

31
Q

What is the advantages of dams?

A

Provide flood protection
Provide irrigation water

32
Q

What are the disadvantages of hydropower?

A

Costly to transmit electricity over long distances

33
Q

What are the environmental and social costs of Hydropower?

A

Reservoirs

Flood land and villages
displace people
disrupt downstream ecosystems
alter streamflow patterns
trap silt

GE101 - Exam 3 (9 decks)

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