Bath Elem. 4th gr.science ch 12

17 terms by azrjn

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matter, heat, conduction and radiation

if a picture shows many balls closly packed together, what kind of matter is being shown?

a solid

as an object cools, the particles move____?

slower

if the liquid inside of a thermmometer is contracting what does it mean?

the substance being measured is cooling down

what is temperature?

the measure of the average amount of motion in particle of matter

if a pot is on the stove, how is the heat moving from the stove to the pot?

conduction

materials that both limit the amount of heat that passes though them are?

insulators

what is convection current?

when heated air expands and cooler air sinks below the warmer air.

If warmth from the sun or a light bulb is heating your skin, what are you feeling?

radiation

what is thermal energy?

the total energy of mving particles

which method of heat transfere does not require matter?

radiation

if a mobile is turning from a candle burning below it, what method of heat transfere is occuring?

convection

what is energy?

the ability to do work or cause change

what is the difference between an insulator and a conductor?

insulator limits the amount of heat that passes through it.
conductor easily allows heat to move into it

give an example of an insulator.

wood, blanket, coat

give an example of a condutor.

metal spoon, metal pan

how does a radiator heat a room?

by convection.
1 -water is heated in a boiler
2 -then steam is pumped into pipes in the radiator which passes through it into the air
3 -convection currents move the air
4 -cooler air returns to the radiator and the process begins again

how do radiation, conduction and convection all work on Earths surface?

1 -radiation from the sun heats up earths surface.
2 -then conduction transfers heat into earths air.
3 -convection currents form as the surface is heated
4 -warm air rises then cools and falls back to earth as rain or snow causing wind and rain patterns

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