Bismuth, for example - when you melt it, the solid chunks float on the liquid.

In the brown gravy, whiteish chunks of meat floated.

It is quite heavy; a chunk of iron can float on mercury.

A chunk of my life had floated away before my eyes.

Enormous chunks of ice floated and bobbed on the dark gray water.

There were large chunks of material, much hotter than the background, floating in space.

Below, in the singing fountains, small, broken dirty chunks of ice floated in the brackish water.

Below, chunks of ice floated at the bottom of the blast hole.

He wondered if any other giant chunks of the Lynx were floating free.

Huge chunks of ice floated in these waters, as large as islands or small continents themselves.