conduction, convection and radiation L5

What process is conduction?

Heat & electricity transmited directly through substance as direct touch.

How does heat travel?

Convection

When does convection occur?

Movement of liquids and gas.

What takes place of particles with less heat energy in convection?

High heat energy particles.

Why do particles take up more volume?

As gap between widens but particles stay the same.

Radiation does not include particles? T/f?

True

What is thermal energy?

Heat energy

What does dense mean?

Material with particles tight in

What does temperature mean?

Average kinetic energy of each particle.

What is internal energy?

Sun of all kinetic energy in object.

What do atoms do when they get hot?

Vibrate

What conducts heat better? Black or white?

Black

How does something evaporate faster?

If water temp high so particles are fast so kinetic energy is high.

How does thermal energy flow?

Hot to cold

What is a poor conductor called?

insulator

How is heat carried in metal?

By electrons

What is the best conductor?

Metal

How do clothes keep us warm?

Traps air round us

Where can convection not happen?

In solids

When molecules are hot what happens?

They occupy more space

Are hotter fluids more dense than cold?

Yes

Do hotter fluids rise or sink?

Rise