A pure substance contains only one type of chemical

A mixture is a material that contains two or more different substances which can be physically separated

An impurity is a chemical that is found in a material in very small amounts, but can change the material's properties

Pure substances

Science

In the Separation techniques unit, they will build on this knowledge to learn about separation techniques in terms of the particle model.

In the Y5 Properties, changes and separating materials unit, pupils learnt about mixtures, including solutions, and separation techniques including filtering and evaporation.

Solutions

A {{}} material is composed of only one type of chemical.

Which of the following is an example of a pure substance?

What is the name given to a substance found in a material in very small amounts, but which can alter the material's properties?

Complete this sentence: A significant feature of a mixture is that it...

Which diagram correctly represents a mixture in the solid state?

Mixtures boil at a single, specific temperature.

Mixtures contain only three types of chemicals.

Mixtures boil over a range of temperatures.

Mixtures must contain at least two types of chemicals.

Which of these statements about mixtures are true?

The three states of matter are: solid, {{}}, and gas.

Which of the following are examples of materials in the solid state at room temperature?

Match the state of matter with the correct particle diagram.

The temperature at which a liquid turns into a gas.

The temperature at which a liquid turns into a solid.

The temperature at which a gas turns into a liquid.

The temperature at which a solid turns into a liquid.

Which description correctly describes a substance's melting point?

particles only vibrate in fixed positions

What properties would you expect of a material with this particle arrangement?

Starter Quiz