Heating and Cooling Flashcards
what is heat energy?
the energy needed to make the temperature of something rise
what is another name for heat energy?
thermal energy
how does heat energy move?
moves from places with high temps to low temps if it is able to
what is heat energy measured in?
joules
what is conduction?
when thermal energy travels through the solid from the hot region to the colc region
what does heat energy pass through easily?
metals
what do we call something that heat passes easily through?
good conductors of heat
what is a poor conductor?
solids that don’t let the thermal energy travel through them easily
what is one of the best insulators?
air
why is air a poor conductor of heat?
the particles in air are spread out
what do we do to use air as an insulator?
trap it
what does conduction make things feel?
cold
name a good conductor
metal
what is convection?
when heat rises and cold air replaces it
what is the cycle of air known as?
a convection current
what is radiation?
when heat energy travels from a heated object
what type of surfaces are good absorbers of infra red radiation?
dark, dull surfaces
what kind of surfaces do not absorb infra red radiation very much and are good reflectors of radiation?
light, shiny
what objects in life five of infra red radiation?
everything
what are 2 advantages of using a data logger?
it is more precise and puts the results into graphs more easily
name 2 disadvantages of using a data logger?
it may run out of power and is expensive
