We do not necessarily recommend the following explanation for 5 th graders but here is the idea: An object floats when it displaces a volume of water that has a mass equal to the mass of the object.

Some materials seem to disappear when added to water. We say they have dissolved. They are still there, but the particles are so small you can no longer see them. There are some materials that do ...

have turned their attention to carbon-based materials to remove PFAS from water. The research team, led by Associate Professor Manabu Fujii from the Department of Civil and Environmental ...

Some materials seem to disappear when added to water. We say they have dissolved. They are still there, but the particles are so small you can no longer see them. There are some materials that do ...