1a Flashcards
(15 cards)
what 3 ways can heat be transferred
conduction, convection and radiation
what is heat radiation
it is the transfer of heat energy by infared radiation
what does conduction and convection involve
the transfer of energy through paticles
what is conduction
it is the main form of heat transfer in solids
what is convection
it is th main form of heat transfer in liquids and gases
what surfaces absorb infrared radiation the best
mat black/dark surfaces
what surfaces reflect infrared radiation the best
light shiny surfaces
what are the 3 states of matter
soli liquid an gas
what properties do sloids have
strong forces of attraction, particles close together, fixed regular arrangement, only vibrate in fixed positions
what properties do liquids have
weaker forces of attraction, paticals close together but can move past each other and form irregular arrangements, more energy than solids,ov in random directions at low speeds
what properties do gases have
almost no forces of attraction between prticles, more energy than liquids and gases, free to move in random direction, fast
how is heat transferred in solids
by convection
what happens durin the conduction of heat energy
vibrating particles pass on their extra kinetic energy to neighbouring particles
why are metals good insulators
because they have free electrons which are free to move inside the metal
in what 2 states of matter does convection occour
in liquids and gases
