GCSE Physics

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Author:
ghoran
ID:
147204
Filename:
GCSE Physics
Updated:
2012-04-12 07:45:43
Tags:
efficient use energy
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Description:
the efficient use of energy
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  1. energy cannot be ..... or ...... . it can only be ........ from one form to another
    • created
    • destroyed
    • transformed
  2. when energy is transferred or transformed part of it may ....... be transformed or transferred , the rest is ...... . in both cases , the energy is eventually transferred to the ......... , which become ..... . the energy becomes increasingly ..... ... and so .... ....... to use for further energy transformations
    • usefully
    • wasted
    • surroundings
    • warmer
    • more difficult
  3. many devices take in ..... in one form and ..... the .... into another form
    • energy
    • transform
    • energy
  4. much of the energy used in homes and industry is ....... energy . this is because ........ energy is readily transported with little ....... of ..... and is ...... converted into other forms of energy such as ....... (...... energy) , ...... , ....... , ...... energy (......)
    • electrical
    • electrical
    • loss of energy
    • easily
    • heat (thermal energy)
    • light
    • sound
    • kinetic energy (movement)
  5. energy transfers often involve , not only heat , light , sound , movement and electricity , but the ...... (......) energy . for practical purposes energy often has to be stored . the most common forms of energy for storage purposes are : (4)
    • chemical energy
    • elastic energy (strain energy)
    • gravitation potential energy
    • nuclear energy
  6. what are the ten types of enegry
    (most kids hate learning GCSE energy names)
    • magnetic
    • kinetic
    • heat
    • light
    • gravitational
    • chemical
    • sound
    • elastic
    • electrical
    • nuclear
  7. chemical energy is in
    fuels , foods and batteries . fuels , including foods , are especially useful because they are concentrated energy sources
  8. elastic energy is in
    elastic objects whose shape has been changed (e.g. springs or elastuic bands)
  9. gravitational potential energy is in
    objects raised above the ground level and water in dams
  10. nuclear energy is
    released by fission of heavy elements or fusion of lighter ones
  11. what 4 forms of energy are forms of stored energy and why
    • graviational potential energy
    • elastic potential energy
    • chemical energy
    • nuclear

    the above three are forms os stored energy because the energy is obviously not doing anything , it's kind of waiting to happen i.e. waiting to be turned into one of the other forms of energy
  12. energy can be ..... usefully from one form to another , ...... or ...... - but it cannot be ..... or ......
    • transferred
    • stored
    • dissipated
    • created
    • destroyed
  13. explain the energy conversions in lighting a match
    including the actions you or the match does
    • initial energy = stored chemical energy in the match
    • the match burns
    • produced energy = heat and light
    • useful energy = heat
    • wasted energy = light
  14. explain the energy conversions in connecting a battery to a lamp
    • initial energy = stored chemical energy in lamp
    • transnferred to = electrical energy
    • transferred to = light and heat energy
    • useful energy = light
    • wasted energy = heat
  15. explain the energy conversions in using a hammer to knock a nail into a block of wood
    including the actions you or the hammer does
    • initial energy = stored chemical energy in your body
    • you do work lifting the hammer
    • converted to = graviatational potential energy in the raised hammer
    • energy converted as the hammer falls
    • converted to = kinetic energy of the moving hammer
    • hammer does work driving nail into wood
    • converted to = kinetic enegry in the block , nail and hammer and sound energy in the air
    • useful energy = kinetic
    • wasted enegry = sound
  16. explain the energy conversions in using a battery-driven motor to raise a load
    including the loss of energy
    • chemical energy is stored in the battery
    • converted to electrical energy
    • heat loss in wires carrying electric current
    • converted by the motor to kinetic energy of the moving parts
    • heat loss in bearings and moving parts
    • converted to gravitational energy of the raised load
  17. food contains ..... energy . this is converted into several forms of energy e.g. : ...... energy as the body and limbs are moved , ............... energy if the person climbs the stairs , .... energy as the person speaks and ... energy to keep the body at the correct temperature
    • chemical
    • kinetic
    • gravitational
    • sound
    • heat
  18. complete the table below to show the energy changes that take place in each device listed
  19. list 6 ways to reduce energy consumption
    • wind turbines
    • biofuels
    • low energy light bulbs
    • switch of heating and wear a jumper
    • use solar panels to heat your house
    • turn off things such as the TV rather than leaving it on standby
  20. the efficiency of a device is always
    less than 100% as some energy is always lost
  21. devices never transform all of the input energy to the to the ..... energy we want , or transfer it all to the place we want . we know the ...... of devices so that we can .... between them , including how ..... ... they are , and try to improve them
    • output
    • efficiency
    • choose
    • cost effective

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