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heat energy
heat energy--test 2
14
Science
4th Grade
01/19/2008

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Cards

Term
Describe how heat moves through solids.
Definition
When the solid gets hot, the particles begin to vibrate faster.  These particles bump into the slower moving particles.  Soon all the particles are vibrating rapidly.  Heat energy is passed along this way.
Term
Describe how heat moves through liquids and gases.
Definition
Heat energy moves through a liquid or gas through convection.  The particles move from one place to another.  At first only the air near the heat is heated.  As this air is heated, the particles that make up the air begins to move faster and farther apart.  Warm air rises (less dense) and the cool air moves down (more dense).  The cool air pushes the warm air up.
Term

How is heat energy measured?

 

 

Definition
Heat energy is measured in a unit called a calorie.  Adding calories of heat energy to matter raises its temperature.
Term

Temperature is measured in units called ___________________

Definition
degrees/Celsius/Fahrenheit
Term

The measure of how fast particles move is called __________________

 

Definition
temperature
Term
An example of conduction is __________________________________
Definition
A stove heating a pan or pot
Term
The more heat energy matter has, the faster the particles ______________________
Definition
move and vibrate
Term
Heat from a radiator or vent moves by ____________________________________
Definition
convection
Term
The movement of heat energy in waves is called _______________________________________
Definition
radiation
Term
Heat energy can move easily through materials that are _______________________
Definition
good conductors of heat
Term
The movement of heat through liquids and gases is called _____________________
Definition
convection
Term
The movement of heat through a solid is called __________________________________
Definition
conduction
Term
Waves of energy from the sun strike matter and are changed into _____________________
Definition
heat energy
Term
Heat by the sun is called ______________________
Definition
radiation
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