[Music] [Music] [Music] all objects around us have two things in [Music] common they have mass and volume everything that has mass and volume is matter the mass of an object is a measurement of the amount of matter it contains the greater the matter of an object the greater its [Music] mass mass is measured in kilogram or its derived units [Music] the volume of an object is a measurement of the space it occupies the greater the matter of an object the greater its volume volume is measured in cubic meters or its derived units on the other hand density is the ratio between mass and volume it is a property of materials since each material has its own specific density therefore different objects made of the same material always have the same density regardless of their mass and volume [Music]