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12-2 Heat Transfers
Chapter 12 Section 1
19
Science
6th Grade
03/13/2009

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Term
true or false
The faster the molecules of a gas are moving the more energy they have.
Definition
true
Term
The total energy of motion in the molecules of a substance is called..
Definition
thermal energy
Term
The average amount of energy of each molecule of a substance is called
Definition
temperature
Term
true or false:
Temperature is a measure of how hot or cold a substance is.
Definition
true
Term
Air temperature is usally measured with a...
Definition
thermometer
Term
How does a thermometer work?
Definition
A thermometer works because liquids expand when they are heated and contract when they are cold.
Term
The freezing point for
celcius____
farenheit____
the boiling point
c____
f____
Definition
freezing point
c 0
f 32
boiling point
c 100
f 212
Term
the energy transfered from a hotter object to a cooler object is.....
Definition
heat
Term
heat can be transfered by
Definition
1.radiation
2.conduction
3.convection
Term
true or false
Radiation is the direct transfer of heat by electromagnetic waves(ultraviolet radiation)
Definition
true
Term
The direct transfer of heat from one substance to another that is touching is called ______________.
Definition
Conduction (2 substances that are in contact)
Term
Conduction works well in some ________ though very well in __________.
Definition
solids and metals
Term
The transfer of heat by the movement of a fluid is called
Definition
convection
Term
Feeling the sun's warmth on your face is
Definition
radiation
Term
Drying your boots over a hot air vent is __________
Definition
convection
Term
Burning your bare feet on hot sand is
Definition
conduction
Term
__________ air is more dense than __________ air; therefore, ______ air rises and _________ sinks.
Definition
Cold = more dense than warm
Warm air rises, cold air sinks
Term
most of the heating in the troposphere is caused by
Definition
convection
Term
The upward movement of warm air and downward movement of cold air is
Definition
convection currents
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