Today, we had a first look into our new unit on chemical reactions. Mr. Doktor showed us 3 different demos on chemical reactions, one involving the bunsen burner and magnesium. We also learned a very important lab safety tip: never light a match when there is gas in the room. Towards the end of the class, Mr. Doktor told us to write out 6 ways in which we could tell a chemical reaction has occured. We came up with these: smell, bubbles, taste, colour, a precipitate is formed, gas, smoke and when new substance is formed.
Here is a video explaining the five major chemical reactions:
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