Lesson 2 Summary - Thermal Energy Transfers

What are the three ways in which Thermal energy can be transferred?

1. Radiation

2. Conduction

3. Convection

Radiation

Heating by location

Conduction

Heating by Touch or Direct physical touch

Convection

Heating by Mixing

When does Convection occur

1. Liquids

2. Gases

Thermal conductor

Material allowing easy flow of thermal energy, like metals.

Thermal insulator

Material which thermal energy doesn’t flow easily.

Specific heat

Amount of heat required to raise the temperature of a material.

Thermal expansion

Increase in a material's volume due to a rise in temperature.

Thermal contraction

Decrease in a material's volume when decrease in temperature.

How do materials expand ?

Materials expand when heated

How do materials shrink ?

Materials shrink when cooled

When are Thermal expansion and contraction most noticeable ?

gases

When are Thermal expansion and contraction least noticeable ?

liquid’s and Solids

Can radiation transfer heat through a solid, a liquid, and gases ?

yes, it can