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8th Science > Energy > Flashcards

Energy Flashcards

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1
Q

All nonrenewable energy sources

A

Fossil Fuels & Nuclear

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2
Q

All renewable energy sources

A

Biomass, geothermal, hydroelectric, tidal harness, solar, wind

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3
Q

Efficiency of fossil fuels

A

37-48%

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4
Q

Efficiency of Nuclear

A

35%

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5
Q

Efficiency of solar

A

15%

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6
Q

Efficiency of wind

A

20-40%

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7
Q

Efficiency of biomass

A

12-40%

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8
Q

Efficiency of geothermal

A

15%

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9
Q

Efficiency of hydroelectric

A

95%

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10
Q

Tidal harness

A

90%

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11
Q

Advantages and disadvantages of fossil fuels

A

Adv.
-Infrastructure
-more energy per mass than biomass
-can be used anywhere
Dis.
-non renewable
-pollution
-releases greenhouse gases

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12
Q

Advantages and disadvantages of Nuclear

A

Adv.
-Not as much air pollution as fossil fuels
-releases largest amount of energy with the smallest mass
Dis.
-generates radioactive waste
-causes health & environmental problems
-very dangerous

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13
Q

Advantages and disadvantages of biomass

A

Adv.
-renewable
-by burning it decreases mass in landfills
-we can grow plants using biomass
Dis.
-releases toxins from burning wood
-contributes to global warming

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14
Q

Advantages and disadvantages of geothermal

A

Adv.
-doesn’t pollute air
-doesn’t release co2
-doesn’t take up much room
Dis.
-some gases smell bad
-not enough locations with hot enough water under the earth

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15
Q

Advantages and disadvantages of hydroelectric

A

Adv.
-renewable
-builds lakes and reservoirs
-increases water supplies
Dis.
-construction of a large dam
-dams are very expensive
-loss of fish and other animals
-causes people to move out of their homes

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16
Q

Advantages and disadvantages of tidal harness

A

Adv.
-renewable
-almost no chemical pollution
Dis.
-only works in few locations
-environment gets damaged
-not all areas have consistently big waves

17
Q

Advantages and disadvantages of solar

A

Adv.
-convenient
-used to spin turbines
Dis.
-making the equipment causes pollution
-takes a large are of land

18
Q

Advantages and disadvantages of wind

A

Adv.
-generates no pollution
-good to power peoples homes
Dis.
-needs a vast area of land
-doesn’t produce much area per turbine
-creates some noise

8th Science (1 decks)

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