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20 terms

Heat Energy and Transfer

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the movement of energy from a warmer object to a cooler object is called
heat transfer
what are the three types of transfer
radiation, conduction, and convection
what is radiation
the transfer of energy through invisible waves through an empty space
what are two forms of radiation
energy from the sun to the earth, or, energy from a flame to a person
what is conduction
heat transfer by direct contact of particles of matter
what is an example of conduction
a spoon in a mug of hot chocolate, or the ground heating the air above it
what is convection
heat transfer by the movement of particles in heated fluids (liquids & gases)
heat transfer by convection is caused by differences of density due to a difference in?
temperature
a measure of the amount of mass there is in a given volume
density
what happens to a fluid when its temperature increases
its density decreases
if a pot of water is no longer heated, when will the convection currents stop flowing?
when the water in the pot is the same temperature throughout
true or false? convection currents flow in the atmosphere
true
true or false? convection currents occur mainly in solids
false- liquids and gases
what are convection currents and what causes them?
the flow or transfer or of heat within a fluid (gas & liquid). a difference in density and temperature
what causes convection currents in earths atmosphere?
the difference in temperature and density
true or false? the transfer of energy through empty space is called convection
false- radiation
true or false? the movement of energy from a warmer object to a cooler object is called heat transfer
true
true or false? conduction is heat transfer by direct contact of particles of matter
true
true or false? radiation is the transfer of heat by the movement of heated fluid
false- convection
what is an example of convection?
a hot air balloon rising