2660881
Descrição
Mapa Mental por Kate Ordidge, atualizado more than 1 year ago
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Criado por Kate Ordidge
mais de 10 anos atrás
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GCSE AQA
Physics
- Energy transfers
- Energy can be
transformed from
one form to
another.
- It involves changing one
form of energy into more
than one form of energy.
- Examples: Match
head (chemical) =
light + heat. Solar
power music box
(light) = sound.
- Energy can be
transformed from
one form to
another.
- Energy efficiancy
- A measure of
how well an object
uses the energy
that is supplied to
it.
- Calculated by: Efficiency
= useful energy
transferred by the device
% total energy supplied to
the device x100
- Examples: 60J
useful + 200J
supply.
Efficiency =
60%20 x100 =
80%
- A measure of
how well an object
uses the energy
that is supplied to
it.
- Cost/paying
for electricity
- E=PxT. Energy (kilowatt
hours - KWH). Power (kilowatt
- KW). Time (hours - H)
- cost = number of units
(energy transferred) x cost
per unit.
- Examples: 0.5
KW x 2 H = 1
KWH. 1 unit = 8p
cost = 1x8 = 8p.
- E=PxT. Energy (kilowatt
hours - KWH). Power (kilowatt
- KW). Time (hours - H)
- Most Kids Hate
Learning GCSE Energy
Names.
- Magnetic, Kinetic, Heat,
Light, Gravitational,
Chemical, Sound, Elastic
potential, Electrical,
Nuclear.
- Magnetic, Kinetic, Heat,
Light, Gravitational,
Chemical, Sound, Elastic
potential, Electrical,
Nuclear.
- Sankey diagrams
- 100J input, 10J output, 90J
wasted. Efficiency =
useful%total x100.
- 100J input, 10J output, 90J
wasted. Efficiency =
useful%total x100.
- Renewable energy
- Solar
- Sun's heat
and light are
turned into:
electrical
energy by
solar cells, or
used to heat
water in
homes using
solar panels.
- Advantages: Renewable +
no pollution.
- Disadvantages:
Expensive +
unreliable
- Advantages: Renewable +
no pollution.
- Sun's heat
and light are
turned into:
electrical
energy by
solar cells, or
used to heat
water in
homes using
solar panels.
- Wind
- Wind turbines turn
kinetic energy into
electrical.
- Advantages:
Renewable, no
pollution, cheap,
easy to build,
nothing burnt.
- Disadvantages:
unreliable +
noisy/ugly.
- Advantages:
Renewable, no
pollution, cheap,
easy to build,
nothing burnt.
- Wind turbines turn
kinetic energy into
electrical.
- Tidal
- High tide the water is trapped behind a dam.
Tide goes out, the turbine moves making the
generator make electrical energy.
- Advantages: Renewable, no
pollution, reliable, cheap to
run.
- Disadvantages:
flooding + expensive
to build.
- Advantages: Renewable, no
pollution, reliable, cheap to
run.
- High tide the water is trapped behind a dam.
Tide goes out, the turbine moves making the
generator make electrical energy.
- Geothermal
- Turn heat energy from
the Earth's rocks into
electrical.
- Advantages:
renewable, no
pollution.
- Disadvantages: Hard to
put in place, expensive.
- Advantages:
renewable, no
pollution.
- Turn heat energy from
the Earth's rocks into
electrical.
- Biomass
- Plant's Chemical energy
turned into
heat/electrical.
- Advantages:
renewable, easily
used.
- Disadvantages:
large areas of land
are needed.
- Advantages:
renewable, easily
used.
- Plant's Chemical energy
turned into
heat/electrical.
- Hydroelectric
- Dam transfers rivers
kinetic energy into
electrical.
- Advantages: Renewable,
no pollution, store water.
- Disadvantages:
expensive to build, ruin
environment.
- Advantages: Renewable,
no pollution, store water.
- Dam transfers rivers
kinetic energy into
electrical.
- Wave
- Machines turn the waves kinetic
energy into electrical.
- Advantages:
renewable, no pollution,
nothing burned.
- Disadvantages: needs lots of
machines, expensive, machines
look ugly, damage.
- Advantages:
renewable, no pollution,
nothing burned.
- Machines turn the waves kinetic
energy into electrical.
- Solar
- Non-renewable
energy
- Coal, oil and gas are all
fossil fules. They are
burned to make heat.
Nuclear reactions in
nuclear fules release
heat.
- Chemical energy
is stored in fossil
fules.
- Coal, oil and gas are all
fossil fules. They are
burned to make heat.
Nuclear reactions in
nuclear fules release
heat.
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