Heat Chapter 22

A piece of metal will feel colder than a piece of wood at the same temperature. Why?

Metals, in general, are good heat conductors

A good absorber of radiation is

a good emitter of radiation

A good reflector of radiation is

a poor absorber of radiation

Heat transfer by conduction in metals occurs when

electrons bump into atoms and other electrons

Heat transfer by means of atoms moving from place to place is conduction.

false

Heat transfer by means of electrons colliding with other electrons in a metal is convection.

false

Heat travels from the sun to Earth by

radiation

Planet Earth loses heat primarily by

radiation

The metallic coating on the glass surfaces of a Thermos vacuum bottle reduces the amount of energy transferred by

radiation

The reason light-colored clothes help keep you cool in warm weather is that clothes of light color

reflect a lot of energy

Firewalkers who walk barefoot on red-hot wooden coals depend on

wood's poor conductivity

The reason you can hold your fingers beside a candle flame without getting hurt is that....

a. air is a poor heat conductor b. hot-air convection currents travel upward c. air convects heat well so... all of the above

A piece of paper wrapped around a thick metal bar will not ignite when touched with a lit match because

a. energy goes to the bar, preventing ignition temperature in the paper. b. the bar keeps the paper relatively cool. c. the bar is slow to heat up so.. all of the above

If you were caught in freezing weather with only a candle for heat, you would be warmest in

an igloo

Energy transfer by convection is primarily restricted to

fluids

Plastic foam is a good heat

insulator

Heat transfer by convection occurs when

large numbers of atoms move from place to place

A good reflector of heat is a poor absorber of heat.

true

Heat that is transferred to us from the sun is transferred by radiation.

true

Materials that are poor heat conductors are insulators

true