1. Mixture: This is the most general term. A mixture is a combination of two or more substances where each substance retains its own chemical properties.

2. Alloy: If you're talking about mixing metals, a combination of two or more metals is specifically called an alloy. For example, bronze is an alloy of copper and tin.

3. Solution: If one substance dissolves completely into another, we call the combination a solution. For example, salt dissolved in water is a solution.

4. Compound: This is a little different. A compound is formed when two or more elements chemically combine in a fixed ratio. The resulting compound has completely different properties from the original elements. For example, water (H2O) is a compound formed from hydrogen and oxygen.

So, tell me more about what you're mixing! That will help me give you the most accurate answer. 😊