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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

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