Changes in Materials Quiz

What is a reversible change?

• A permanent change into a new substance. You cannot get back the substance you started with.

• A change that can be reversed. You can get back the substance you started with.

• A change caused by a chemical reaction.

• A change that causes a substance to stop existing.

Burning will produce a.....

• Reversible change

• Irreversible change

• Both a reversible and irreversible change

• Neither a reversible or irreversible change

Which of the following is an example of a reversible change?

• Evaporation and condensation

• Cooking a cake

• Condensation but not evaporation

• Boiling an egg

Which of the following is NOT an example of a reversible change?

• Melting chocolate

• Freezing ice lollies

• Rusting of the metal on a bike

• Boiling water in a kettle

If you mixed sand, sugar and water which material would dissolve?

• Sand

• Sugar

• Water

• Sugar and sand

What is an irreversible change?

• A permanent change into a new substance. You cannot get back the substance you started with.

• A change that can be reversed. You can get back the substance you started with.

• A change caused by a chemical reaction.

• A change that causes a substance to stop existing.

Which method would you use to separate salt from water?

• Filtration

• Evaporation

• Sieving

• Suspension

Sieving would separate a mixture of...

• Sand and salt

• Rice and sugar

• Rocks and shells

• Salt and water

Which of these would help sugar dissolve in a cup of coffee?

• Cold Coffee

• Cold Sugar

• Not stirring

• Hot coffee

What method would you use to separate sand and water?

• Filtration

• Evaporation

• Sieving

• Suspension