CHEMICAL CHANGES

One of the most important topics in Chemistry is chemical changes.  Students find it interesting because they get what they see; and learning is enhanced when they love what they are doing.

Teachers and students alike could try this simple yet relevant activity for chemical changes. It is always recommended that teachers are around to supervise when students are allowed to do this practical.

Theory:

            There are signs if chemical change has taken place. When one or more substances are formed out of a reaction then chemical change has occurred. In chemical change, the change is usually difficult to reverse. For example, when you cook food, chemical change happens and there is no way you could get back the original substance if you wish to. In chemical change, energy is taken out or given in. Just like, when iron reacts with sulphur; heat is produced. When there is a chemical reaction, the atoms are rearranged so they mixed in an entirely different way.

FIREWORKS AT WORK

There is a more interesting activity to explain how fireworks are made, without actually exposing the students to greater risk. ( I have to say greater because there is still a risk doing this practical.) How do fireworks create that spectacular fountain of colours and amazed young and old alike. The gorgeous exploding mixture of purples and reds, blues, yellows, greens, lilac, is just a salt away. Chemistry has loads to offer when it comes to interesting activities, and this is one of those.