Examine table sugar under a microscope and observe that it is made up of identical crystals. By placing it in a cup and melting in the microwave, it becomes a homogenous golden liquid. You read the ingredient list on the box and find that only one ingredient is listed: refined sucrose. The evidence you gathered indicate that table sugar is an example of a:
pure substance
Table sugar is pure substance which contains only one type of atoms and so it is homogeneous.