Question

1. Why do you think different substances take different time to start burning?
2. why is it easir and less dangerous to store wood than kerosene ?
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Answer 1

Answer:

1) Answer: it is because of their different ignition or burning temperature.

2) Similarly, Kerosene oil and wood do not catch fire on their own at room temperature. But if both are heated a little, than kerosene oil will catch fire and not wood. This shows that ignition temperature of kerosene oil is lower than that of wood.

Answer 2

Hope it's help you...!!!✌️❣️

☞ It is more difficult to burn some combustible substances than others because different substances catch fire at different temperatures. Some substances have a low ignition temperature; therefore, they can catch fire more easily than others.

☞ Similarly, Kerosene oil and wood do not catch fire on their own at room temperature. But if both are heated a little, than kerosene oil will catch fire and not wood. This shows that ignition temperature of kerosene oil is lower than that of wood.