Chemical Changes-Digging Deeper

Here's more about Chemical Changes! 

There are 3 different types of reactions (for Chemical Changes)

1. Combination
• Two or more elements react to form a new compound
2. Decomposition
• Substances breaking down into 2 or more substances
3. Combustion
• Involves the burning of a substance in the presence of oxygen to form new compounds
• The result of combustion (reaction) is oxygen and carbon dioxide 

Here's a picture to show you an example of decomposition! (: 

I can't remember what really happened, but basically we heated this green powder up and it changed colour to black :D 

This is the only photo I have from the experiments for Chemical Changes :( Hope this short post was useful, everyone good luck for TAs on 16th May!! (: