P3 - Changes of state and the particle model

What is the equation for density ?

• Density = volume / mass

• Density = mass / volume

• Volume = density x mass

• Volume = density / mass

What are the measurements for the density equation ?

• density, ρ, in kilograms per metre cubed, m/m3 grams, m, in kilograms, km

  volume, A, in metres cubed, m4

• volume, ρ, in kilograms per metre cubed, kg/m3 volume, m, in kilograms, kg

  volume, V, in metres cubed, m3

• density, ρ, in kilograms per metre cubed, kg/m3 mass, m, in kilograms, kg

  volume, V, in metres cubed, m3

• density, f, in kilograms per cm cubed, kg/m3

  mass, m, in kilograms, kg

  volume, V, in metres cubed, m2

What happens when a substance changes state ?

• Mass is conserved

• Mass decreases

• Mass increases

• Mass is dissolved

Which is a liquid ?

• 
• 
• 
• None of them

Which is a gas ?

• 
• 
• None of the above

• 

Which is a solid ?

• None of them

• 
• 
• 

What is a change of state ?

• A chemical change

• A physical change

• A table change

• A science change

What is the change of state from a solid straight to a gas called?

• melting
• evaporating
• freezing
• sublimation

Tags

NGSS.MS-PS1-4

When a liquid changes state and becomes a solid it is known as...

• condensation

• melting

• vaporisation

• freezing or solidification

A state change from a gas to a liquid is...

• condensation

• evaporation

• expansion

• movement