There are many lightweight solids. A sheet of paper, aluminum foil, balsa wood, a plastic bag, foam rubber, and cotton balls are all solids, and very lightweight.
A marshmallow is an example of a solid foam because it is made up of tiny gas bubbles trapped in a solid matrix of sugar, gelatin, and water. These gas bubbles give the marshmallow its spongy, lightweight texture, making it a solid foam material.
chair
A lightweight and rigid.
A solid cube has six faces. That's a solid fact.
Brass
For example refining of sodium chloride.
A piece of uncut gemstone like a raw diamond would be an example of a rough solid.
Mark angelo porras..
butter
I am not going to answer your homework so sorry
solid,liquid and gasses
Water turning from a liquid into a solid. Of course by FREEZING it.