Volume and Density

Volume = the amount of space an object takes up
Density  = the amount of kilograms packed into every m^3 of an object.

Volume 

SI Unit = m^3, L, cm^3, mL

Density 

SI Unit = kg/ m^3, g/ cm^3


Density = Mass/ Volume
- a positive scalar quantity



- A mass of 1000kg of water has a volume of 1m^3

Therefore, the density of water = 1000kg/m^3 or 1g / cm^3



How can densities sometime vary?
1) Most substances  get a little bigger when heated, the increase in volume reduces their density
2) The density of gases can vary enormously on how compressed they are



Important densities to remember  =

Water = 1000kg/m^3
Air = 1.3 kg/m^3
Ice = 920 kg/m^3
Gold = 19300 kg/m^3
Osmium(the densest substance on Earth) = 22600 kg/m^3

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