3. Measuring volume of irregular
objects
The volume of irregular objects
heavier and insoluble in water is
measured by displacement
method
Measuring cylinder with water is
used for displacement method
4. Displacement method procedure
Take the measuring cylinder a few times
larger than the object
Fill it with water so that the object gets
completely immersed
Immerse the object in water and observe the
water level rise
Increase in level of water in the cylinder is the
volume of the object
7. Defining mass and density
Mass is the amount of matter an object
contains or is made of
The SI unit of mass is kg
More concentration of matter makes an
object heavier or denser
Density is defined as mass per unit
volume or it the ratio of mass to volume
8. Formula of density
Unit of density is
kilogram per unit
cubic metre
Density of water
is 1000 kg per
cubic metre
Density of gold is
19,300 kg per
cubic metre