WHAT IS COMBUSTION Recall the activity of burning of magnesium ribbon performed in Class VII. We learnt that magnesium burns to form magnesium oxide and produces heat and light (Fig. 6.1). We
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COMBUSTIBLE AND NONCOMBUSTIBLE SUBSTANCES In the reactions mentioned above magnesium and charcoal are combustible substances. Activity 6.1: Collect some materials like straw, m
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IGNITION TEMPERATURE * Now recall some of your experiences. Does a matchstick burn by itself? How does it burn? * You must have had an experience of burning a piece of paper. Do
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HISTORY OF MATCHSTICK The history of the matchstick is very old. More than five thousand years ago small pieces of pinewood dipped in sulphur were used as matches in ancient Egypt. The modern safet
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