| A | B |
|---|
| thermal conductor | a material that allows heat to pass through it easily |
| thermal insulator | a material that does not allow heat to pass through it easily |
| insulation | material that reduces or prevents the transmission of heat, sound or electricity |
| thermal expansion | the tendency of matter to change in volume in response to a change in temperature |
| contraction | the process by which an substance becomes smaller as its particles move closer together |
| thermal conduction | the transfer of heat through an object by the vibrations of its particles |
| expansion gap | a space between two surfaces designed to safely absorb heat induced expansion and contraction of various construction materials |
| bimetallic strip | a strip consisting of two metals fused together that bends when heated |
| density | a measure of the compactness of a substance, expressed as its mass per unit volume |
| convection | the upward and downward movements (currents) of fluids (liquids and gases) caused by heat transfer |
| convection current | the transfer of heat through a fluid (liquid or gas) by the movement of current |
| *rivet | to fasten or secure with a metal bolt (v); one of these metal bolts (n) |
| conduction | transfer of heat between substances that are in direct contact with each other |
| *fluid | a liquid or a gas |
| conduction | transfer of heat between substances that are in direct contact with each other |
