More reversible changes
I can demonstrate how mixing and dissolving are reversible changes
More reversible changes
I can demonstrate how mixing and dissolving are reversible changes
Lesson details
Key learning points
- If a change is reversible, it can be undone or changed back to its original state.
- A mixture is material that contains two or more different substances, which can be physically separated.
- When a soluble solid dissolves, it is broken down to become so tiny we can no longer see it, but it is still there.
- Dissolving is a reversible process. Evaporation can be used to recover soluble solids from solutions.
Keywords
State - The three common states of matter are solid state, liquid state and gas state.
Recover - To recover is to get back something that had changed or was taken away.
Reversible - If a change is reversible, it can be undone or changed back to its original state.
Dissolve - If a solid dissolves in a liquid, it mixes so completely with the liquid that it cannot be seen.
Mixture - A mixture can be physically separated.
Common misconception
Changes in state and dissolving and mixing are not reversible processes.
Teaching slides will show which processes can be used to reverse state changes and dissolving. This will be explored and embedded during the practice tasks.
Equipment
Equipment and materials for making lemonade and then to separate the original materials from a sample of it. 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).
Lesson video
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Starter quiz
6 Questions
when a substance changes from its solid state to its liquid
when a solid is broken into very small pieces and disappears
Exit quiz
6 Questions
