There are 2 main changes in Matter : Physical and Chemical
In a Physical Change:
no new substance is formed
the chemical composition does not change
it is reversible (you can drink water(liquid) if you melt ice :)
Eg. boiling point, melting point
In a Chemical change:
it is irreversible (you can't undo a salad dressing)
new substances are produced
Eg. burning, cooking
So these are the basic changes in matter
Here are some questions that you can answer.
Classify each of the following as either chemical or a physical change
a) formation of a fog
b)burning a cigarette
c)sprouting of a seed
d)rusting of iron
e) mixing yellow and blue paint to make green paint
f) separating an alcohol- water mixture into water and alcohol
The answers will be up shortly!
Written by JK
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