Heat Transfer

These flash cards will test you on the three types of heat transfer: conduction, convection, and radiation

What are the three types of heat transfer

Conduction, convection, radiation

What happens when heat transfer occurs

The energy is carried through one substance to another

What is conduction

The transfer of heat when solids have direct contact with each other

What is convection

The transfer of heat through a liquid or a gas caused by molecule motion

What is radiation

The transfer of heat through electromagnetic waves (light)

What direction does conduction occur from

Warmer region to colder region

How does conduction transfer heat from one particle to another

Vibrating particles transfer thermal energy to neighbouring particles

What is thermal conductivity

How well an object transfers thermal energy by conduction

What do objects with high conductivity mean

The particles are close together and it causes a lot of collisions

What do objects with low conductivity mean

the particles are farther apart creating fewer collisions

Does metal have high or low conductivity

High

Does plastic have high or low conductivity

Low

Does wood have high or low conductivity

Low

What are the particles in liquids like

They have a weaker force and are farther apart from each other

What are the particles in gases like

They have a very weak force and are very far apart from one another

What phases of matter does convection occur in

Liquids and gases

How does convection work

Heated particles become less dense and rise to the top and cold particles sink to the bottom. Hot particles at the top will cool and sink and the cool particles at the bottom will heat up and rise.

What is the difference between conduction and convection

In convection the particles move around, in conduction the particles stay in one place

How does radiation work

All objects (especially hot ones) have radiation and radiant energy is energy transferred without particles

Why is wind convection

In the daytime when there is sun/warm heat, the land heats up quickly and the warm rises and the wind blows towards the coast

Do all objects have radiant heat

Yes

What tool is used to see an objects radiant heat

A infrared camera

What heat transfer does the sun use

Radiation because of the light waves (electromagnetic)

What is another word for electromagnetic waves

Light waves

What heat transfer does warm air use

Convection

What heat transfer does the ground use to heat up the air

Conduction