* Compound: A compound is formed when two or more elements chemically combine in a fixed ratio. For example, water (H₂O) is a compound because it's always made of two hydrogen atoms and one oxygen atom.

* Mixture: A mixture is a combination of two or more substances where each substance retains its individual properties. Ice water is a mixture because:

* The ice (frozen water) and the liquid water are both H₂O. They are the same substance in different states.

* The ratio of ice to water can vary.

Let me know if you have more questions!