* Generally, yes: Adding a solid to water *will* usually increase the overall volume of the mixture. This is because the solid takes up space, and that space is added to the space already occupied by the water.
* Exceptions exist:
* Dissolving: If the solid dissolves completely in the water, like sugar or salt, the volume might not increase significantly. This is because the dissolved particles occupy spaces between water molecules, not necessarily adding to the total volume.
* Density: Some solids are denser than water. If you add a dense solid, the overall volume might actually decrease slightly. This is because the solid displaces a volume of water equal to its own volume, and since it's denser, the displaced water has a larger volume than the solid itself.
To summarize:
* Adding a solid that doesn't dissolve will usually increase the volume.
* Adding a solid that dissolves might not change the volume much.
* Adding a very dense solid might even slightly decrease the volume.
