Page 6 - Class VI Activities Forces and Energy

Subtopic: 3.6 Changes in Energy

Ac+vity: Candle Energy Experiment: Inves+ga+ng Energy Changes

Learning Objec+ve:- To observe and understand how thermal energy is transferred from a
candle flame to a substance (cooking oil), resul)ng in a temperature change.

Materials required:- Candle, Safety glasses, Glass beaker or metal can, Tripod, and gauze,
Thermometer, Stopwatch or )mer, Heat-proof mat, S)rring rod, Cooking oil, Matches

Procedure:
1. Measure the ini)al temperature of the cooking oil.

2. Light the candle and place it under the beaker.
3. S)r the oil regularly with a s)rring rod (not the thermometer).
4. Record the temperature every minute un)l it increases by
10°C.
5. Stop hea)ng once the 10°C rise is achieved.
6. Blow out the candle safely.

Conclusion- This experiment shows that chemical energy
from the burning candle is transformed into thermal energy,
which heats the cooking oil

Assessment Ques+ons:
1. What type of energy is stored in the candle before it is lit?
2. What happens to this energy when the candle burns?
3. Why is it important to s)r the oil regularly during the experiment?
4. What energy change is observed in this ac)vity?
5. Can you think of another example where heat is transferred from one object to another?

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