Chemical Change - Good or Bad?

Today's Science lesson, we discussed about the good and bad points of chemical changes and did some experiments on heating matters so as to see their reactions.

I used to think that when we heat sugar (white crystals), it would melt and would eventually turn into a colourless liquid and evaporate. Of course, I was wrong. But now I think that when we heat sugar (white crystals), it will melt and then turn into a black solid. In addition, a sweet smell will evolve.

I used to think that chemical changes usually have advantages and do not have any disadvantage on us or to the environment. But now I think that chemical changes have both advantages and disadvantages. Example of advantages in chemical changes is that they allow us to produce products, like medicines and petrol, which we can use in our daily lives. As for the example on disadvantages in chemical changes is that they may produce products, such as chemicals, that will cause pollutions and bring harm and damage to living and non-living things respectively.

(Sugar heated and turned into black solid)



Sources: Google Images