Burning: an irreversible change
I can describe burning as an irreversible change, where a new material is formed.
Burning: an irreversible change
I can describe burning as an irreversible change, where a new material is formed.
Lesson details
Key learning points
- When a substance burns, it produces a flame.
- For burning to take place there has to be fuel, oxygen and a high enough temperature.
- When things burn, new materials are usually formed.
- Burning is a change that cannot be reversed.
- Burning materials can be observed closely as they change over time.
Common misconception
Burning, heating and melting are the same. Smoke and water vapour are the same.
Slides teach that heating and melting are reversible changes because the original materials can be recovered but that, with burning, the original materials cannot be recovered. The difference between smoke and water vapour is also taught.
Keywords
Burn - To burn is to be on fire.
New material - A new material is formed when a starting material goes through an irreversible change.
Irreversible reaction - If a reaction is irreversible, it cannot be undone or changed back to its original state. Irreversible changes make new materials.
Observe - To observe is to look very closely and use other senses too.
Equipment
Trays, sand, tea lights, matches or a safety lighter, tongs, paper.
Content guidance
- Risk assessment required - equipment
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
heating
cooling
Exit quiz
6 Questions
can be changed back again
cannot be changed back again
