* Solubility and Temperature: Generally, the solubility of most solids in liquids *increases* with temperature. This means that you can dissolve more solid in a hotter solvent.
* Milo: Milo is a mixture of ingredients, including powdered milk, malt extract, and cocoa powder. These ingredients have different solubilities. While some components might be more soluble in hot water, others might be more soluble in cold water.
* Freezing Point: At freezing point, the water molecules become less mobile and less able to interact with the Milo particles. This makes dissolving more difficult.
* Boiling Point: At boiling point, the water molecules are moving very fast, and there is more energy available to break apart the Milo particles and help them dissolve.
However:
* Milo's Properties: Milo contains sugars and other ingredients that might form a sticky paste at lower temperatures. This paste could make it harder to dissolve in cold water.
* Practical Considerations: It's much easier to *notice* if Milo dissolves in hot water because the hot water can melt any clumps faster.
Conclusion: While the general rule is that solids dissolve better in hotter liquids, the specific properties of Milo might make it seem like it dissolves better in boiling water. In reality, the difference in solubility between the two temperatures might not be significant.
