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AQA GCSE - Physics > 1.4 Methods To Generate Electricity > Flashcards

1.4 Methods To Generate Electricity Flashcards

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1
Q

What is a renewable resource?

A

A natural source that is not depleted or diminished by use

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2
Q

What is a non-renewable source?

A

Source of energy the exists in finite quantities
And
Not capable of being replenished once used

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3
Q

Name some renewable sources of energy

A 
Wind
Solar
Geothermal
Biofuels 
Tidal
Hydrological
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4
Q

Name some non-renewable sources of energy

A

Coal
Oil
Nuclear

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5
Q

What do all energy sources do except solar?

A

Use the source to turn a turbine to spin a generator to generate electricity

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6
Q

Advantages of wind energy

A

Renewable source
Doesn’t release Greenhouse gases
Brings power to remote locations
Low running cost

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7
Q

Disadvantages of wind energy

A

It is weather dependent
Installation is expensive
Visual pollution
Noise pollution

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8
Q

Advantages of Solar energy

A

Renewable energy source
Low maintenance
It’s a clean energy source (No pollution)
No noise pollution

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9
Q

Disadvantages of solar energy

A

The initial cost is high
It is weather dependent
Takes up a lot of space

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10
Q

Advantages of Geothermal energy

A

Obtained from natural substances (volcanic areas)
Non polluting
Low maintenance cost
Not weather dependent

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11
Q

Disadvantages of Geothermal energy

A

Few sites have geothermal potential energy
Danger of volcano eruption
Installation cost is high

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12
Q

Advantages of biofuels

A

Renewable
No greenhouse gases
Lower pollution

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13
Q

Disadvantages of biofuels

A

High cost of production
Could lead to a shortage of crops (obtained from plants)
Uses a lot of water to irrigate the crops

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14
Q

Advantages of Wave/Tidal energy

A

Renewable source
Doesn’t produce greenhouse gases
71% of earth is water = large area to harness power
Efficient power

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15
Q

Disadvantages of Wave/Tidal energy

A

Cost of construction is high
Few ideal locations for construction
Disrupts fish migration

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16
Q

Advantages of hydropower

A

Clean source of energy
Doesn’t pollute the air
Renewable
A lot of rain in the UK

17
Q

Disadvantages of hydropower

A

Fish cannot migrate because of the dams
Dams are big and expensive to build
Can impact water quality
Impacted by droughts

18
Q

Advantages of Crude Oil and Coal

A

Everything already runs on it
Reliable energy
High energy density
Constant power source

19
Q

Disadvantages of Crude oil and coal

A

Non-renewable
Releases CO2
Contributes to pollution
Growth of terrorism/power around

20
Q

Advantages of Nuclear energy

A 
Practically renewable 
Doesn't release pollution into atmosphere 
Low transport cost
Most concentrated form of energy
Doesn't depend on the weather
21
Q

Disadvantages of Nuclear energy

A

Nuclear waste is toxic
Waste is difficult to dispose
If a nuclear accident happens it can affect generations for years to come
Long start up time

22
Q

How do fossil fuels, and biofuels create electricity?

A

They are burned to heat water

The steam produced turns a turbine to spin a generator

23
Q

What substances are used in nuclear energy? Which process?

A

Plutonium and uranium

Nuclear fission

24
Q

What is carbon capture?

A

New technology designed to capture carbon

Preventing Carbon dioxide building up in the atmosphere by catching and storing it

25
Q

What are the best natural containers for carbon capture?

A

Old oil and gas fields
For example
Under the North sea

26
Q

How is electricity distributed around the country?

A

By the National grid from power stations

27
Q

Why is electricity constantly supplied?

A

It cannot be stored

28
Q

What are used along the journey of electricity?

A

Transformers

29
Q

What do transformers do at the step up?

A

They increase the voltage
Which decreases the current
Therefore the wires don’t glow and less energy is lost

30
Q

What do transformers do at the step down?

A

Decrease the voltage

To make the voltage safe for use in a home at around 240 volts

AQA GCSE - Physics (16 decks)

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