glossary Flashcards
(27 cards)
carbon-neutural
when a process does not result in net contribution of carbon dioxide to the atmosphere, for example the burning of biofules
chemical energy store
energy stored in chemical bonds
conduction
the transfer of heat or electricity through a material
conductor
a material that allows electrons to move freely inside it. this means that electrical charge and thermal energy can pass through it easily
conservation of energy
energy cannot be created or destroyed
energy transfer
the movement of energy from one transfer to another
geothermal energy
energy harnessed from hot rocks beneath the earths surface
hydroelectricity
electrically generated by harnessing energy from falling water
insulator
a material that does not allow energy to transfer through it easily
mass
the amount of matter in an object measured in kilograms
non-renewable resourse
an energy source which cannot be replenished in a lifetime and will eventually run out
nuclear energy store
the energy stored in the nucleus of an atom
power
the rate at which energy is transferred or the rate at witch work is done measured in watts
radiation
the transfer of energy as electromagnetic waves or as moving subatomic perticles
renewable resource
can be replenished and will not run out
solar power
energy transferred from the sun
spring constant
a measure of the stiffness of a spring, measured in newtons per metre
thermal conduction
the transfer of thermal energy through a solid
tidal power
energy harnessed by tidal flow
work done
the transfer of energy from one energy store to another
ammeter
a component used to measure electric current in a circuit
charge
a property of a particle that causes it to experience a force in an electric field
current
the flow of electrical charge measured in amps presented in an equation with the letter I
resistance
the degree in witch a component opposes the flow of electrical charge measured in ohms represented in an equation by the letter R
