Question

if you melt ice down to water, is that a physical change or a chemical change?
chemical change
physical change

Explanation:

A physical change alters the form or state of a substance without changing its chemical composition. When ice melts to water, it changes from a solid to a liquid state, but it is still composed of water molecules ($H_2O$). In a chemical change, new substances with different chemical properties are formed. Since melting ice does not create new substances, it is a physical change.

Answer:

Physical change