Matter is the substance of everything that exists.
Matter is anything that has mass and volume.


Mass is the amount of matter something contains.
Mass is measured in grams (g).
1000 grams = 1 kilogram


Volume is the amount of space something occupies.
Volume is measured in millilitres (ml).
1000 millilitres = 1 litre

Matter and its properties
by Happy Learning English

Mass, volume, and density
by Science Bits