Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

GCSE AQA physics combined > P1,2&3 energy > Flashcards

P1,2&3 energy Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards GCSE Religious Studies - Edexcel Route A flashcards AP® Physics flashcards GCSE Religious Studies - Eduqas Route A flashcards GCSE Geography - AQA flashcards GCSE Religious Studies - Edexcel Route B flashcards GCSE Religious Studies - Eduqas Route B flashcards
1
Q

what is a system

A

an object or group of objects

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what happens when a system changes

A

there are changes in the way that energy is stored

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what is internal energy

A

the total kinetic and potential energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is the conservation of energy

A

energy cannot be created or destroyed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

how do you reduce unwanted energy transfers

A

lubrication
thermal insulation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what is meant by thermal conductivity

A

how well a material conducts energy when heated

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what are the two walls of a house called

A

external brick wall
internal breezeblock wall

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what keeps houses warm

A

insulating material which a a very low thermal conductivity and reduces overall thermal conductivity of the wall by over 10x

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

why do houses have double glazed windows

A

they have a very low thermal conductivity so less heat escapes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what is loft insulation

A

a material with a low thermal conductivity so less thermal energy passes through

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what is the equation for power

A

power = energy / time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

why can no device be more than 100% efficient

A

you cant get more energy than you put in

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

how would you investigate the heat capacity of materials

A

measure start temperature
switch on electric heater
measure end temperature
measure voltage and current to find power
repeat using different liquids
calculate specific heat capacity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what is the specific heat capacity

A

the amount of energy required to raise the temperature of one kilogram of the substance by 1 degree Celsius

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what are earths main energy resources

A

fossil fuels (coal, oil and gas),
nuclear fuel,
bio-fuel,
wind,
hydroelectricity,
geothermal, the tides,
the Sun and water waves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what is a renewable energy source

A

an energy source which can be replenished

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what is a non renewable energy source

A

energy sources which will eventually run out

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

what are the uses of energy resources

A

heating
transport
electricity generation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

what happens in a closed system

A

total energy never changes but it can be transferred from one store to another

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

what are the energy transfers when an object is projected upwards

A

kinetic energy to gravitational potential

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

what are the energy transfers when an object hits an obstacle

A

kinetic energy to thermal and sound energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

what are the energy transfers when a car is accelerating

A

chemical to kinetic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

what are the energy transfers when a car brakes

A

kinetic to thermal

24
Q

what are the energy transfers when water boils in a kettle

A

electrical to thermal

25
Q

what are the main uses of biofuel

A

transport and electricity generation

26
Q

what are the disadvantages of biofuel

A

large areas of land are needed can be at the expense of crops in poorer countries

27
Q

what are the advantages of biofuel

A

it is a renewable energy source

28
Q

what are the main uses of wind

A

electricity generation

29
Q

what are the disadvantages of wind turbines

A

not a constant source of energy
noisy
some people think they ruin the countryside

30
Q

hat are the advantages of wind turbines

A

its a renewable energy source

31
Q

what are the main uses of hydro electricity

A

electricity generation

32
Q

what are the advantages of hydroelectricity

A

renewable

33
Q

what are the disadvantages of hydroelectricity

A

large areas of land must be flooded
alters ecosystems
displaces people living there

34
Q

what are the main uses of geothermal

A

heating
electricity generation

35
Q

what are the advantages of geothermal

A

renewable

36
Q

what are the disadvantages of geothermal

A

only available in a limited number of places

37
Q

what are the main uses of tidal

A

electricity generation

38
Q

what are the advantages of tidal

A

renewable

39
Q

what are the disadvantages of tidal

A

can alter habitats variation in tide can affect output

40
Q

what are the main uses of solar

A

electricity generation
heating

41
Q

what are the advantages of solar

A

renewable

42
Q

what are the disadvantages of solar

A

depends on light intensity
expensive

43
Q

what are the main uses of water waves

A

electricty generation

44
Q

what are the advantages of water waves

A

renewable

45
Q

what are the disadvantages of wtaer waves

A

unreliable
alter habitats

46
Q

what are the main uses of nuclear fuel

A

electricity generation and military support

47
Q

what are the disadvantages of nuclear fuel

A

produces radioactive waste
costly to build
non renewable

48
Q

what are the advantages of nuclear fuel

A

reliable

49
Q

what are the main uses of coal

A

heating transport
electricty

50
Q

what are the advantages of coal

A

reliable

51
Q

what are the disadvantages of coal

A

greenhouse gases
acid rain

52
Q

what are the main uses of oil

A

transport
heating

53
Q

what are the advantage sof oil

A

reliable
provides compact source of energy for transport

54
Q

hat are the disadvantages of oil

A

environmental damage

55
Q

what are the main uses of gas

A

heating
electricity
transport

56
Q

hat are the advantages of gas

A

reliable

57
Q

what are the disadvantages of gas

A

produces carbon dioxide

GCSE AQA physics combined (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions