When sugar melts and becomes a liquid, is it still sugar? Explain.

Yes, it is still sugar.

Explanation:

Melting is a physical change, in which a substance passes from a state of aggregation to other. During physical changes, the nature or identity of the subtance does not change. So, when sugar melts it changes only its state of aggregation: it passes from the solid state to the liquid state, but it is still the same substance: sugar.