What is a mixture in science?

Different elements together that can be separated again

a mixture is a material made up of two or more different substances which are physically combined.

Explanation:

alfred von schlieffen, german army chief of staff, was given instructions to devise a strategy that would be able to counter a joint attack. in december, 1905, he began circulating what later became known as the schlieffen plan. schlieffen argued that if war took place it was vital that france was speedily defeated.