Grade five Science Competesion

What happens when you mix peanuts and raisins together?

• They form a new substance.

• They change their properties.

• They remain as separate substances.

• They dissolve into each other.

Which of the following is an example of a mixture?

• Water

• Salt

• Sugar

• Sand and pebbles

How can you separate sand and blocks in a mixture?

• By boiling them.

• By dissolving them in water.

• By picking out the blocks.

• By crushing them together.

Why is it difficult to separate iron from iron ore?

• Because iron ore is too hard.

• Because iron and other substances are tightly mixed.

• Because iron is invisible in iron ore.

• Because iron ore is too heavy.

What do factories use to separate iron from iron ore?

• A strainer

• A magnet

• A lot of energy

• A chemical reaction

Which of the following mixtures can be easily separated?

• Iron ore

• Salt water

• Nuts and raisins

• Sand and salt

Which of the following is NOT a property of a mixture?

• It can be separated into its original components.

• components of the mixture don`t affect each other.

• It produces a new substance.

• Its components retain their individual properties.

Which of the following is an example of a solution?

• Sand and water

• Oil and water

• Salt water

• Cereal and milk

What happens when you dissolve salt in water?

• The salt disappears completely.

• The salt and water form a new substance.

• The salt settles to the bottom of the container.

• The salt particles become bigger.

What is a solution?

• A mixture where substances are not evenly mixed.

• A mixture where substances settle to the bottom.

• A mixture where substances are evenly spread out.

• A mixture of only liquids.