Physical changes
Every around us is made up of mater. Books, tables, water and air are all made up matter.
All objects are made up of matter. Sound light and thoughts don't have any matter. Matter has got three states: solid, liquid and gaseous.
Matter can change in shape.
Matter can change it’s position without changing it’s position
Mass
Mass is the amount of matter in an object.
Mass is meusared in kilograms or grams.
For example: a house has more matter than a book.
Density
We calculate the density of an object by its volume.
To calculate the density of an object,we first need to know it's mass and its volume.
Volume
Volume is the amount of the space an object occupies.
The volume of liquids is measured in measuring cylinder.
The value of the measuring line on the cilynder is the volume.
