One method of classifying matter is to start with the two main categories of pure substances and mixtures. Pure substances can be classified as either elements or compounds. Mixtures can be classified as either homogeneous or heterogeneous.
Another method of classifying matter is to start with the two main categories of homogeneous substances and heterogeneous substances. Heterogeneous substances are heterogeneous mixtures. Homogeneous substances can be classified into pure substances and homogeneous mixtures. Pure substances can be classified into elements and compounds.
Everything around us which has some mass and occupies some space is known as matter. Matter is made up of tiny particles called atoms and molecules. For Example, NaOH,
These NaOH crystals can also be considered as matter and each of these crystals are composed of millions and trillions of atoms.Not only this NaOH, infact your study table, pen, pencil and our bodies too can be considered as matter. Depending on the fact that how these atoms are arranged,in different substances we can classify matter into it's 5 states:-