Brainscape's Knowledge GenomeTM

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


See full index

GCSE Physics > 4. Eergy rescources & Energy transfers > Flashcards

4. Eergy rescources & Energy transfers Flashcards

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

name 10 energy types and an example of each

come with rhyme to help remember

A 
chemical- foods, fuels, batteries
kinetic- anything moving
gravitational-anything which can fall
elastic- springs, rubber bands 
thermal- heat ( flows from hot objects to cold)
magnetic- 
electrostatic
nuclear- nuclear reactions
light- sun, light bulbs
sound- speakers
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

name 4 ways of energy transfers

A

mechanically
electrically
heating
radiation ( light and sound)

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

conservation of energy law

A

energy can not be created or destroyed it can only be transferred from one form to another

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

efficiency equation

A

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

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

examples- energy transfer in tv

A

electrical -> light + sound ( heat = waste )

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

be able to show energy transfers on a Sankey diagram

A

???

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

what 3 ways can thermal ( heat) energy be transferred

A

convection- liquids + gases
conduction- solids
radiation- solids, liquids, gases

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

radiation is the transfer of heat energy by ?

A

electromagnetic waves

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

convection + conduction is the transfer of heat energy by ?

A

particles

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

definition of conduction

A

the process where vibrating particles pass on their extra kinetic energy to neighbouring particles

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

definition of convection

A

occurs when the more energetic particles move from the hotter region to the cooler region and take the heat energy with them

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

what are convection currents all about

A

changes in density

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

explain the role of convection in everyday phenomena

A

??? radiator - (hot less dense air by radiator rises and denser cooler air flows to replace it )

??? Immersion heater

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

explain how emission and absorption of radiation are related to surface and temp.

A

??? an object that is hotter than its surroundings emits more radiation than it absorbs ( as it cools down)

an object that is cooler than its surroundings absorbs more radiation than it emits ( as it warms down)

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

explain ways of reducing unwanted energy transfer ( in a house )

A
  1. loft insulation- thick layer of fiberglass wool laid on loft floor + ceiling = less heat loss y conduction and convection
  2. double glazing - 2 layers of glass with narrow air gap between = less conduction and convection
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

how does insulation work

A

???

17
Q

how do humans reduce heat transfer

A
  1. cold= hairs on skin stand up = trap thick layer of insulating air around the body= limits amount of heat loss by convection
  2. clothes pockets of air trapped in clothes + between layers = reduce heat loss by convection + conduction
  3. clothes = material absorbs some heat radiated by bodies= reduce heat loss by radiation
18
Q

work done equation

A

work done = force x distance moved ( in direction of force)

19
Q

what is work done = to

A

energy transferred

20
Q

GPE equation

A

gravitational potential energy = mass x gravitational field strength x height

21
Q

kinetic energy ( KE) equation

A

kinetic energy = 1/2 x mass x velocity ( speed) “2 ( squared)

22
Q

due to the conversation of energy what is the link between GPE and KE

A

GPE lost = KE gained

23
Q

how would you describe power

A

the rate of transfer of energy

the rate of doing work

24
Q

power equation

A

power = work done / time taken

25
Q

PAPER 2

name 7 energy transfers used in generating electricity

A 
wind 
water
geothermal
solar
fossil fuels 
nuclear
26
Q

PAPER 2

what are non renewable sources of energy

A

fossil fuels

  • coal
  • oil
  • natural gas

nuclear fuels

27
Q

PAPER 2

what are renewable sources of energy

A

wind
water
geothermal
solar

28
Q

PAPER 2

how does non renewable resources of energy work

A
  • Boiled water- steam drives all turbines
  • Turbine connected to generator
  • Magnet coil turns in generator
  • Generator produces electricity
29
Q

PAPER 2

how does renewable resources of energy work

A
  • Wind/ Sun/ Tidal ( whatever resource) drives all turbines
  • Turbine connected to generator
  • Magnet coil turns in generator
  • Generator produces electricity
30
Q

PAPER 2

advantages of fossil fuels

A
  • high energy density

* on & off when want

31
Q

PAPER 2

advantages of nuclear

A
  • VERY high energy density

* on & off when want

32
Q

PAPER 2

disadvantages of fossil fuels

A
  • Non- renewable , will run out

* Produces green house gases- contribute to global warming

33
Q

PAPER 2

disadvantages of nuclear

A
  • Dangerous
  • releases radiation- cancer- will kill you
  • extra security needed- expensive
  • non renewable- will run out
34
Q

PAPER 2

advantages of renewable energy sources

A
  • Don’t produce green house gases- not contributing to global warming
  • Renewable- won’t run out
35
Q

PAPER 2

disadvantages of renewable energy sources

A
  • need certain types of location - weather based

* not reliable- can’t control the weather

36
Q

PAPER 2

need to add more disadvantages and disadvantages

A

???

GCSE Physics (8 decks)

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