Reversible changes of state
I know that changes of state are reversible changes.
Reversible changes of state
I know that changes of state are reversible changes.
Lesson details
Key learning points
- The three states of matter are: solid state, liquid state and gas state.
- A change of state is when one state of matter changes to another.
- Changes of state are reversible changes whereby the material that has been changed can return to its original state.
- Melting, freezing, evaporation and condensation are examples of reversible changes of state.
Common misconception
Children often think that ice, water and steam are three different substances and not water in different states, and that changes in state are not reversible processes.
Teaching slides will reinforce that ice (solid state), water (liquid state), and water vapour (gas state) are all water and show which processes can be used to reverse state changes. This will be further explored and embedded during practice tasks.
Keywords
State - The state of a substance is the form in which it can exist.
Substance - A substance is the material that something is made up of.
change of state - Changing state is when one state of matter changes to another.
Reversible - If a change is reversible, it can be undone or changed back.
Equipment
See additional materials.
Content guidance
- Risk assessment required - equipment
- Exploration of objects
Supervision
Adult supervision required
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Video
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Starter quiz
6 Questions
to separate an insoluble solid from a liquid
to separate a soluble solid from a liquid
Exit quiz
6 Questions
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
freezing
condensation