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Science Y7 Spring > Energy > Flashcards

Energy Flashcards

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1
Q

Two electric charges that attract or repel each other have energy in their __________ ______

A

negative charge

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2
Q

What is an example of something with energy in its elastic charge?

A

Rubber bands, springs, etc
Anything stretched has energy in its elastic energy store

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3
Q

Magnetic Energy Store

A

Two magnets that attract or repel each other have energy in their magnetic energy stores.

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4
Q

Name 8 types of energy stores

A
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5
Q

What are the 4 main ways that energy can be transferred between stores?

A
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6
Q

What is the conservation of energy principle?

A
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7
Q

Give examples of conservation of energy

A

For example a ball is dropped:

Gravitational potential of the ball decreases —–> Kinetic store of the ball increases

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8
Q

What is another word for wasted energy (D)

A

Dissipation

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9
Q

Total energy INPUT =

A

The useful energy + The wasted energy

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10
Q

Name some chemical energy stores

A

Batteries, food, fuels like wood, etc

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11
Q

Name non-renewable energy types

A

Coal, fossil fuels, nuclear power

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12
Q

Name 5 examples of renewable energy sources

A

Any of the following:
solar energy, wind, hydropower, geothermal, tidal, wave, biomass

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13
Q

solar energy advantages

A

Solar power is a renewable energy resource.

There are no fuel costs.

No harmful gases are released.

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14
Q

wind advantages

A

Wind is a renewable energy resource.

Wind does not release any harmful gases.

There are no fuel costs involved in running a wind turbine.

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15
Q

hydropower advantages

A

There are no fuel costs.

No harmful gases are released

Reliable

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16
Q

geothermal advantages

A

Geothermal is a reliable energy resource.

There are no fuel costs.

No harmful polluting gases are produced.

The hot water and steam can also be used for heating buildings directly.

17
Q

tidal advantages

A

There are no fuel costs.

No harmful gases are released.

Relatively clean

18
Q

wave advantages

A

There are no fuel costs.

No harmful gases are released.

Reliable

19
Q

biomass advantages

A

Biomass is a renewable energy resource.

Growing more crops takes in carbon dioxide. This can offset what is given out during burning. This is called carbon neutral.

20
Q

solar energy disadvantages

A

It is an unreliable energy resource. It is dependent on the weather and how many hours of sunlight there are.

Solar panels are expensive to fit.

21
Q

wind disadvantages

A

Wind turbines can make a lot of noise and some people do not like to live near them because of this.

Some people think that wind turbines spoil the landscape.

Wind is an unreliable energy resource - the amount of electricity that is generated is dependent on how windy it is.

22
Q

hydropower disadvantages

A

Building dams and tidal barrages can harm habitats and displace people from their homes.

Blocks underwater life

Creates methane

23
Q

tidal disadvantages

A

Can only be installed on coastlines

Unreliable

Low power

24
Q

wave disadvantages

A

Affects marine life

High costs

May affect local fishing zones

25
Q

biomass disadvantages

A

Gases and smoke are released as the biomass fuel is burnt.

Lots of land is needed for growing the fuel crop.

26
Q

True or false: photosynthesis converts energy carried by light to biomass

A

True

27
Q
A
28
Q

How is the sun’s energy transferred to the kinetic energy store of the wind

A
29
Q

Name 5 energy resources that come from the sun

A
  1. Sun’s energy to light to photosynthesis to dead plants/animals to fossil fuels
30
Q

How does the sun make waves?

A

It heats up the atmosphere, causing wind. This wind makes waves.

31
Q

Which of natural gas, coal, waves, wind, biomass and fuel don’t rely on photosynthesis? Select two options.

A

Waves and wind

Science Y7 Spring (3 decks)

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