Year 7 Science: Mixtures and Separation Quiz

Which of the following is NOT a state of matter?

• Solid

• Liquid

• Force

• Gas

What happens to the particles in a substance when it melts?

• They stop moving completely

• They become more tightly packed

• They move faster and slide past each other

• They move further apart and become still

Particle theory tells us that:

• All particles are the same size

• Particles are only found in solids

• Matter is made up of tiny particles always in motion

• Particles only move in liquids

Which change of state occurs when water vapour turns into liquid water?

• Melting

• Boiling

• Condensation

• Freezing

A pure substance:

• Has particles that are all the same

• Can always be separated by filtering

• Has particles that settle over time

• Always contains water

Which of the following is a heterogeneous mixture?

• Saltwater

• Vinegar

• Oil and water

• Soft drink

Which process best separates salt from saltwater?

• Filtration

• Evaporation

• Sieving

• Magnetic separation

In a sugar solution, the sugar is the:

• Solute

• Solvent

• Solid

• Suspension

Which of the following is TRUE about solutions?

• They can always be separated by filtration

• They have visible layers

• They are evenly mixed and clear

• They always contain gas

What is the best method to separate sand from a mixture of sand and water?

• Evaporation

• Condensation

• Filtration

• Decanting