heat lessons lesson 5

Cards (13)

what is heat transfer?
the conversion or transfer of thermal energy from one substance to another
how many types of heat transfer is there
three
what are the three types of heat transfer?
conduction, convection, and radiation
what is conduction? 
the transfer of heat or electricity through direct contact
what is convection? 
particles in fluids with high energy take the places of particles with low energy
what is radiation? 
the transmission of energy
what is a conductor? 
a material that allows the flow of electricity through it
what are convection currents?
convection works when a warm fluid rises due to its density, and because it rises upwards, the fluid further above is pushed down
what is radiation pt 2?
the transmission of energy through space in the form of waves
what are the 3 levels of ionizing radiation?
alpha radiation, beta radiation, and gamma radiation
what is alpha radiation? 
blocked by paper
what is beta radiation?
blocked by metal
what is gamma radiation? 
requires lots of earth or rock to stop it