Matter
It consists of something which has weight, occupies space and which can affect our senses.
Molecule
Matter is made of molecule. A molecule is the smallest particle of a substance which can exist in a free state and possesses the properties of that substance.
Atom
It is the smallest particle of an element, capable of taking part in a chemical reaction.
Mass Weight
Quantity of matter contained in a body. Force with which a body is attracted towards earth.
Difference between Mass and weight
The weight differs at different places in accordance with the variation in gravity (g) while the mass always remains the same.
Mass
It is measured in Kilograms or pounds, while weight is measured in dynes and poundals. Unit of Mass is Kilogramme.
Density
Mass per unit volume.
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