What do we all have in common?

What is the opposite of a conductor?

Name a poor conductor of heat?

What makes bubble wrap a bad conductor and a good insulator?

Name a good conductor of heat?

What is a conductor? What is an insulator?

Name an effective conductor

Name an effective insulator

What makes metals good conductors?

Why do we need insulators?

In which state(s) of matter are particles

touching?

Which state(s) of matter can flow?

Heads or tails?

Heat transfer

ConductionConvection

Radiation

There are 3 types of heat transfer we need to study:

What is convection?

Convection is the transfer of heat in fluids. A fluid is a liquid or a gas. A cycle is set up in which heat is transferred

The density of a substance depends on how far apart its

particles are.

High density

Low density

Less dense regions of particles will rise up

More dense regions of particles will fall down

Why does hot air rise?

Hot air is lighter than cold air

Diffusion as there are less particles higher in the air

Hot air is less dense than cooler air as the particles spread out

The particles get bigger so can reach higher

Statement Order

The less dense fluid risesWhen a substance is heated it expands.

The warm fluid is therefore less dense.When it reaches the top it cools and contracts.The more dense fluid sinks.The cycle of rising and falling is the convection current.

Convection currents

A Convection current is a cycle of hot air rising and cool air falling

Why doesn’t convection happen in solids?

Where is the coldest part of the fridge?

Where should you put a smoke detector and why?