The three common states of matter are solid state, liquid state and gas state.

A substance is the material that something is made up of.

A change of state is when a material changes from one state of matter to a different state.

If a change is reversible, it can be undone or changed back.

Reversible changes of state

Science

Properties of materials

Uses of everyday materials

Thermal insulators: plan

Thermal insulators: do and review

Everyday uses of thermal insulators

Insulating our homes and schools (non-statutory Climate Change & Sustainability)

Soluble and insoluble

Recovering insoluble solids

Providing safe drinking water (non-statutory Climate Change & Sustainability)

Separating soluble solids from solutions

Removing salt from seawater (non-statutory)

More reversible changes

Burning: an irreversible change

Burning plants as fuel (non-statutory Climate Change & Sustainability)

Greenhouse gases (non-statutory Climate Change & Sustainability)

Bioplastics (non-statutory Climate Change & Sustainability)

Rusting: an irreversible change

More irreversible changes

How scientists work

In this Properties, changes and separating materials unit, pupils learn to decide how mixtures might be separated, including through filtering, sieving and evaporating. In the Materials challenge unit, they will build on this knowledge to apply their understanding of separating materials to a wider range of everyday situations

In the Everyday materials unit, pupils learnt to compare and group together a variety of everyday materials on the basis of their simple physical properties. In this Properties, changes and separating materials, pupils will build on this knowledge to compare an group together everyday materials on the basis of a wider variety of properties

This unit explores the properties of everyday materials, including hardness, solubility, and conductivity. It covers reversible changes like dissolving and mixing, and irreversible changes such as burning. Emphasis is on scientific enquiries, data recording, and presenting findings with evidence.

Properties, changes and separating materials

Physical activity and equipment requiring safe use

Use of equipment that may require supervision for safety, e.g. scissors in KS1, needles, paint, knives, cooking.

Three common states of {{}} are solid state, liquid state and gas state.

What is it called when one state of matter becomes another state of matter.

the material that has been changed can return to its original state

the material that has been changed can't return to its original state

Match the type of change to the description.

Which of these are examples of reversible changes of state?

Match the change of state to the reverse process.

Which of these is **not** the name of a state of matter?

Which process occurs when water in the liquid state changes to water vapour in the gas state?

to separate an insoluble solid from a liquid

to separate a soluble solid from a liquid

What happens when you stir a teaspoon of sugar in water?

When sugar is dissolved in water, a sugar {{}} is made.

An {{}} substance will not dissolve in a liquid.

Reversible changes of state

Lesson outcome

Content guidance