Glass is made from..

What is NOT a man-made material?

Ceramic is a _______ .

Which man-made material is made by mixing sand, gravel and cement?

With glass you can make:

Glass is:

Which one of the materials listed below is very, very, very brittle, breakable?

Made from sand and gravel, mixed with cement.

Made from sand and limestone.

Natural and Man-made materials are the same material processes

Man-made materials are chemical process.