Safety mathes
Introduction:
As we all know mathes are used to create fire, and safety matches are 'safe' because they don't spontaneously combust. You have to strike them against a special surface in order to get them to ignite. In our daliy life, we use safety matches generally.
Their components or stuctures:
The match heads contain sulfur (sometimes antimony III sulfide) and oxidizing agents (usually potassium chlorate), with powdered glass, colorants, fillers, and a binder made of glue and starch. The striking surface consists of powdered glass or silica (sand), red phosphorus, binder, and filler.
Their steps of using and reactions: 1) When you strike a safety match, the glass-on-glass friction generates heat, converting a small amount of red phosphorus to white phosphorus vapor 4P+5O2→2P2O5++ energy 2) White phosphorus spontaneously ignites, decomposing potassium chlorate and liberating oxygen.
KClO3→KCIO3+O2
3) At this point, the sulfur starts to burn, which ignites the wood of the match.
2KClO3+ 3S→2KCl + 3SO2+ energy
Stephanie

Impact: 1) Matches,especially safety matches are the symbol of human’s improvement that we can make fire whenever and wherever we want and we make it safe and convienent. 2) Safety matches cost less than lighters or others. 3) Safety matches can produce waste of wood and harmful gases according to the reactions.
Conclusion:
There is no doubt the invention of safety matches is a necessary