Density

Question 1

What are 3 key facts about solids

Answer 1

The particles are very closed together
They are arranged in a regular pattern
They vibrate but don’t move from place to place

Question 2

What are 3 key facts about liquids

Answer 2

Particles close together
Particles not arranged in a regular pattern
Particles can move around eachother

Question 3

3 key facts about gases

Answer 3

Particles are far apart
Particles are not in a pattern
Particles move rapidly

Question 4

What does the density of a material tell us

Answer 4

The mass for a given volume

Question 5

What’s the formula for density

Answer 5

Density (kg/m cubed) = mass (kg) divided by volume (metres cubed)

Question 6

What’s a key fact about solids + density

Answer 6

Solids normally have a high density, solids have a lot of mass for their volume because the particles are close together

Question 7

What’s a key fact about liquids + density

Answer 7

Liquids normally have a high density, solids have a lot of mass for their volume because the particles are close together

Question 8

What’s a key fact about gas + density

Answer 8

Gases normally have a low density, gas doesn’t have a lot of mass for their volume because the particles are far apart

Question 9

What’s a key fact about polystyrene and why

Answer 9

Polystyrene has a low density despite being a solid because it has a very open structure and is full of air spaces.