Physics 3: Particle Theory

Question 1

Explain the arrangement of particles in solids

Answer 1

Particles packed very close together

Vibrate about a fixed position

Question 2

Explain the arrangement of particles in liquids

Answer 2

Particles are close together but are still able to move

Question 3

Explain the arrangement of particles in gases

Answer 3

Particles have a lot space particles

Move randomly and quickly because they have the most energy

Question 4

What is the formula for working out density

Answer 4

p=m/v
p= density
m= mass
v= volume

Question 5

When a solid becomes a liquid

Answer 5

Melted

Question 6

When a liquid becomes a gas it is..

Answer 6

evaporated

Question 7

When gas turns back into a liquid

Answer 7

Condensation

Question 8

When a solid goes straight to a gas

Answer 8

Sublimation

Question 9

What happens to particles when they heat

Answer 9

Heat energy (thermal energy) is converted into kinetic energy
This makes the particles vibrate

Question 10

What are the three types of heat transfer

Answer 10

Conduction
Convection
Radiation

Question 11

Conduction only happens in

Answer 11

Solids

Question 12

Convection only happens

Answer 12

Liquids and gases

Question 13

Describe what happens in conduction

Answer 13

One particle will gain heat energy
It will then vibrate
Transfers kinetic energy to neighbouring particles
Which transfers heat across the solid

Question 14

Describe what happens in convection

Answer 14

Particles closest to the heat source will gain kinetic energy
Vibrate + rise to the top
As they rise, they transfer heat energy to nearby particles
Once they reach the top, the cool down and drop

Question 15

Does radiation need particles in order to transfer heat

Answer 15

No

Question 16

What is radiation

Answer 16

Heat wave