Thermal Physics

Question 1

What is the kinetic model

Answer 1

All matter is made up of particles (tiny balls)
Different materials have different types of particles.
The three states of matter are solid, liquid and gas

Question 2

What is brownian motion

Answer 2

Particles move in random directions taking a zig zag shaped path.

Question 3

What happens on a temperature time graph when there is a change of state and why

Answer 3

There is a flat line as the energy is being used to change the state not heat it up

Question 4

What is specific heat capacity

Answer 4

The amount of energy needed to raise the temperature of a 1kg substance by 1 Degrees celcius

Question 5

What is the equation for specific heat capacity

Answer 5

Change in energy / mass times temperature change.

Question 6

What is thermal expansion

Answer 6

Substances get larger as they get hotter.

Question 7

What is conduction

Answer 7

The process where vibrating particles transfer energy from their kinetic stores to those of neighbouring particles.

Question 8

What is convection

Answer 8

The process where more energetic particles of a substance move from a hotter region to a cooler region -and they transfer energy.