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Revising Combustion

Revising Combustion. Revising Combustion. WALT: Conduct an experiment and answer some questions about combustion. What do you remember about combustion?. What is another name for combustion? Burning What 3 things are needed for combustion? Fuel Oxygen Heat

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Revising Combustion

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  1. Revising Combustion

  2. Revising Combustion • WALT: Conduct an experiment and answer some questions about combustion

  3. What do you remember about combustion? • What is another name for combustion? • Burning • What 3 things are needed for combustion? • Fuel • Oxygen • Heat • What are the products of combustion? • Carbon dioxide • Water

  4. We are going to take our candle burning experiment a bit further What you should notice: The light will eventually go out The water from the tray will rise up into the beaker after a few minutes Spend 2 minutes discussing why these things will happen with your neighbour. You will need to think about your knowledge of particles.

  5. Why does the water level rise? • Because the oxygen gets used up • So the space inside the beaker gets replaced by water (once the air has cooled a bit) • This is a bit like suck back (by the way, what is suck back, again..?) • But you may ask, why doesn’t the space get replaced by carbon dioxide? • Because there is twice as much O2 used up as there is CO2 given off

  6. Once you are finished, return to your seats and complete…. • All questions on page 35 and 36 of KS3 Science ‘Materials and their Properties’ (in full sentences)

  7. Plenary Summarise what you have learnt today in 5 words then share this with your partner

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