HEAT ENERGYWHAT IS THE DIFFERENCE BETWEEN

CONDUCTION, CONVECTION, AND RADIATION?

A MEMS Science Production2009

What is heat transfer?

Heat is energy that flows from one object to another.

3 types of heat transfer: Conduction, Convection, Radiation

Heat moves from a hotter to colder objects. When heat is added, molecules move faster. When heat is taken away, molecules move

slower. When a solid gets heated, the molecules

expand. When it cools, the molecules contract. Insulators slow the movement of heat.

Ex. Wool, plastic, wood, fiberglass, and snow.

Heat Video (1:47)

What is the difference between heat and temperature?

Temperature is the measure of how fast the molecules move.

Heat is the thermal energy that moves those molecules.

Heat vs. Temperature Video (1:59)

What is conduction?

Conduction- the flow of heat energy from one molecule to another. Molecules vibrate in solids to pass the energy. Conductor- material that transmits heat

Some metals are good conductors. Copper Aluminum

Conductors and Insulators Video (4:42)

What is convection?

During convection, heat is circulated throughout fluids, such as air and water.

When the liquid/gas molecules heat, they move around more and become less dense. Therefore, they begin to rise.

Wind is a convection current.

Convection Video (1:30)

What is radiation?

Radiation is the transmission of heat

between 2 objects that are not touching. Sunlight is a wave of radiant energy that

can pass through space.

Radiation and the Sun Video (2:28)