Tuakana Chemical and physical changes 06/11/2017
What are physical changes ?
This is changes when you are able to reverse what has been done.
Example:
As you can see there is water inside a cup and ice on the other side. This is basically a physical change because when you freeze water it turns into ice and when you unfreeze ice it turns back into water, that is how you know that it is a physical change.
Facts about physical changes ?
What are chemical changes ?
Chemical changes is when it is not reversible
Example:
As you can see there is a paper getting burnt. Apparently when a paper is burnt it turns into ash and that is it, because it cannot go back into paper then you know it is a chemical change.
Facts about chemical changes ?
It isn’t reversible
This produces light, smoke, gas and so on
There are usually one or more new substances formed or created from that change
Chemical changes happen everyday
There are different kinds of chemical changes