Heat Flow

HEAT FLOW

Objective: •

•

Describe the three methods of heat transfer by conduction (in solid matters), convection (in liquid and gaseous matters) and radiation Identify matter classified as conductor and insulator of heat

Indicator : STUDENTS SHOULD BE ABLE TO 2. Explain the heat flow by conduction (in solid matters), convection (in liquid and gaseous matters) and radiation. 3. Mention the examples of conductor and insulator.

Key Words 1. 2. 3. 4. 5.

Conduction Convection Radiation Conductor Insulator

The Three Processes of Heat Flow :  Conduction  Convection  Radiation

Conduction Conduction is a way of transferring heat through the contact of objects.

Conductors of Heat  Examples:

Insulators of Heat  Examples:

Convection In Liquid

Convection is heat transfer through a fluid with the hotter molecules rising and the cooler ones sinking.

Convection in a Gas

Radiation Radiation is heat transfer through space.

The earth is heated by radiation from the sun.

Application  What

do you use if you want to keep your drink cool or warm?

Heat flow Conduction Solid

Convection

Liquid Conductor Insulator

Gaseous

Radiation Vacuum