Nov,1--Density

Density = Mass/Volume *(D=M/V)

- unit for liquid is g/mL

  unit for solid is g/cm3

How to calculate density ? There is a Youtube Video can help you understand better.

*The density of water is 1g/mL

-If the density of an object is greater than the density of the liquid---- sink

 If the density of an object is smaller than the density of the liquid---- float

A Youtube Video about sinking and floating in liquid