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26 terms

Year 9 IGCSE Physics Revision

STUDY
PLAY
thermal energy
heat energy
light energy
energy in the form of moving light waves
sound energy
energy of vibrations carried by air, water, or other matter
kinetic energy
the energy an object has due to its motion
electrical energy
the energy of electrically charged particles moving from one place to another
chemical energy
energy stored in chemical bonds
elastic potential energy
energy stored by something that can stretch or compress
gravitational potential energy
energy stored by objects due to their position above Earth's surface
Conservation of Energy
a fundamental principle stating energy cannot be created nor destroyed but only changed from one form to another
efficiency
=(useful energy output / total energy input) x 100
work done
force x distance (in the direction of the force)
energy transferred
work done
joule
the SI unit of energy
wind power
power derived from the wind (as by wind turbines)
water power
energy produced from falling water to move machinery or generate electricity
tidal power
Electricity generated by the movement of sea water caused by the tides
wave power
Is electrical power produced from ocean waves that is used to turn an electrical generator
geothermal power
A form of power obtained from steam or hot water coming from within the earth's interior
solar heating
heat from the sun heats water in glass panels which is used for hot water or for heating
solar cell
A device that converts solar radiation into electricity.
fossil fuel
a nonrenewable energy resource formed from the remains of organisms that lived long ago
nuclear power
the use of controlled nuclear reactions to produce steam, which in turn drives turbines to produce electricity
convection
the transfer of thermal energy by the circulation or movement of a liquid or gas
conduction
the transfer of energy through solids
radiation
the transfer of energy by electromagnetic waves
insulation
a substance that reduces the transfer of thermal energy