What are two classifications of mixture?

Answer 1

Homogeneous mixtures and Heterogeneous mixtures.

Homogeneous mixtures are those mixtures whose composition is same throughout i.e., the different components cannot be observed. The mix completely. for example, in true solutions like salt or sugar solution you cannot see the sugar or salt after mixing. They are completely mixed. Also, one spoon of that solution will have the same composition as 2 spoons of the same solution.

Heterogeneous mixtures on the other hand, do not have the same composition. They do not mix thoroughly and hence the different components can be observed. For example, when you mix salt and sugar or salt and sand, you can make out which is salt and which is the other substance.