What is heat?
Heat is the transfer of kinetic energy from one medium or object to another, or from an energy source to a medium or object. Such energy transfer can occur in three ways: radiation, conduction, and convection.

What are heat sources?
A place from which heat energy comes.

What does evaporate mean?
To change from liquid to gas.

What does contract mean?
To become smaller.

What does expand mean?
To become larger in size.

What is temperature?
A measure of how fast an object's particles are moving.
http://www.youtube.com/watch?v=NVXLDPHGYhg

Thermometer
 A device that measures temperature.
 http://www.youtube.com/watch?v=VlZC4wc-9Cg

Celsius scale
The metric temperature scale used by scientists and by people in most countries, in which water freezes at 0 degrees and boils at 100 degrees.

Degree
A unit of measurement on a temperature scale.

Farenheit Scale
The temperature scale commonly used in the United States in which water freezes at 32 degrees and boils at 212 degrees.

Boiling Point
The point at which a liquid changes to gas.
 http://www.youtube.com/watch?v=0xcxumccf8Q

Freezing Point
The temperature at which a liquid changes to a solid.
 http://www.youtube.com/watch?v=2K2aoBaK76U

Melting Point
The temperature at which a solid changes to a liquid.

Radiation
The movement of energy through a vacuum.

Vacuum
Space that contains mo matter.

Conduction
The movement of heat energy from one molecule to the next.
http://www.youtube.com/watch?v=0cydb3TNEqk

Conductor
Material through which heat travels easily.

Insulator
Material that does not conduct heat well.
http://www.youtube.com/watch?v=XRSuQa_iNt8

Convection
Flow of energy that occurs when a warm liquid or gas rises.
http://www.youtube.com/watch?v=QBVMm9i-pvo

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