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COPY IGCSE Physics > Energy Resources > Flashcards

Energy Resources Flashcards

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1
Q

What type of energy do fossil fuels store?

A

chemical energy

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2
Q

What type of energy do biofuels store?

A

chemical energy

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3
Q

What are different energy resources that obtain useful energy or generate electrical power?

A

fossil fuels
biofuels
hydroelectric dams
geothermal resources
nuclear fuel
solar cells
solar panels

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4
Q

Are fossil fuels renewable?

A

no

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5
Q

Are biofuels renewable?

A

yes

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6
Q

Is hydropower renewable?

A

yes

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7
Q

Are geothermal resources renewable?

A

yes

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8
Q

Are solar cells renewable?

A

yes

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9
Q

Are solar panels renewable?

A

yes

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10
Q

What do solar cells do?

A

use light from the sun to generate electrical power

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11
Q

What do solar panels do?

A

uses infrared/other electromagnetic waves from sun to heat water
also is source of wind energy

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12
Q

Are fossil fuels reliable?

A

yes

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13
Q

Are biofuels reliable?

A

yes, in theory

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14
Q

Are hydroelectric dams reliable?

A

yes

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15
Q

Are geothermal resources reliable?

A

yes

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16
Q

Is nuclear power renewable?

A

yes

17
Q

Are solar cells/panels reliable?

A

yes

18
Q

Which energy resources are worst for the planet?

A

fossil fuels
nuclear (produces radioactive waste)
biofuels (produces less, but still some co2)
hydroelectric system (construction releases co2)

19
Q

Which energy resources are hardest to implement?

A

solar cells (expensive and places further North or South receive less sunlight)
geothermal (only harnessed in certain locations)
nuclear (expensive to build)

20
Q

What is efficiency of energy transfer?

A

how much energy transferred is actually used and not lost

21
Q

Except for geothermal, nuclear and tidal, what is the main source of energy for all our energy resources?

A

the radiation from the sun

22
Q

The sun’s radiation is the main source of energy for all our energy resources except…

A

geothermal, nuclear and tidal

23
Q

Through which process is energy released from the sun?

A

nuclear fusion

24
Q

What is efficiency in terms of energy?

A

% efficiency = (useful energy output/total energy output) x 100

25
Q

What is efficiency in terms of power?

A

% efficiency = (useful power output/total power output) x 100

COPY IGCSE Physics (9 decks)

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