Understanding ignition temperature in Combustion, Fuels and Flames – Class 8 Science Experiment

Chapter Name: Combustion, Fuels and Flames

Activity Name: Understanding ignition temperature in Combustion, Fuels and Flames

Activity Description:

Understanding ignition temperature in Combustion, Fuels and Flames - Class 8 Science Experiment

The experiment aims to understand the concept of ignition temperature by comparing the combustion of two paper cups, one with water and one without water, when heated using a candle.

Required Items:

  1. Two small paper cups, water, tripod stands, candle.

Step by Step Procedure:

  1. Take two small paper cups.
  2. Pour water into one of the cups.
  3. Place the two cups on separate tripod stands.
  4. Heat both cups simultaneously using a candle flame, following the setup shown in the figure.

Experiment Observations:

  • Note which cup burns first.
  • Observe whether the water in the cup becomes hot or not, and record the findings.


  • Handle the candle flame with care to avoid accidents.
  • Ensure a safe distance from flammable materials during the experiment.
  • Perform the experiment under adult supervision, especially when involving children.

Lesson Learnt from Experiment:

The experiment demonstrates the concept of ignition temperature, which is the minimum temperature at which a substance starts to combust. The cup without water likely reaches its ignition temperature faster and burns first compared to the cup with water, which remains cooler due to the heat-absorbing properties of water.

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