Pumice, a volcanic rock that is like a silicate version of Styrofoam, will float on water, if it is of high enough air content (some pumice is, some is not). Pumice rock is ground up and added to cleansers and some soaps (Lava) as a scrubbing agent.
Rocks generally do not float on water because their density is greater than that of water. However, certain types of rocks, like pumice, can float due to their unique structure, which contains numerous air pockets that reduce their overall density. When the density of a material is less than that of the water, it can float, demonstrating the principle of buoyancy.
Objects that are denser than water will sink, such as rocks, metal objects, and certain types of wood. Objects that are less dense than water will float, such as plastic bottles, rubber ducks, and foam.
Pumice.
rocks, metals ect.
The extrusive volcanic rock pumice can float on water. Other extrusive volcanic rocks are not so lucky.
Because rocks are more dense than water
Items that are denser than water will sink to the bottom. This includes materials like rocks, metals, and certain types of plastics. Objects that are less dense than water will float on the surface.
They play with rocks that float around in the water
Yes, if it makes the water denser, the boat will float easier. For example, it is easier to float in salty water.
Well rocks don't float because they are a solid with no air.
Pumice stones will, these are low density rocks formed by volcanoes
too dense to float