Year 7 Chemistry Revision Quiz

Which best describes HOW decantation works to separate mixtures?

• Funnel and filter paper

• Pouring the top layer of liquid away from bottom sediment

• Adding chemicals to form flocs

• Boiling the mixture as different substances have different boiling points

What is turbidity?

• How heavy a solution is

• How saturated a solution is

• How clear a solution is (cloudiness)

• How hot a solution is

Which best describes a solution in terms of mixtures?

• A liquid that is dissolved and hard to tell that it is a mixture

• A mixture of visible rocks and water

• A mixture with high turbidity

• Water is a mixture

What does saturated mean?

• The maximum solute has dissolved and there is extra

• Not enough solute has dissolved

• Some solute has dissolved

Which process would you use to separate a dissolved solution of sugar and water?

• Decantation

• Filtration

• Evaporation

When the sun warms up ocean water, the water changes into ___________ and rises

• liquid water

• ice

• condensation

• vapour

What process best separate small solid particles (like sand) and water?

• Decantation

• Fine filtration

• Distillation

What is the Periodic Table? A table showing all....

• Compounds

• Mixtures

• Elements

Another word for sleet, rain, hail is....

• snow

• evaporation

• carbon

The Atomic symbol for Oxygen is....

• Ox

• O

• Ge

• Xe