Materials Science: Wood and Plastics

Ferrous metals do not include iron and its derivatives.

Stone materials can be classified into only two types: natural and artificial.

All textile fibers are short fibers.

Hardwood comes from fast-growing trees.

Petroleum is a type of ceramic material.

Composite materials are a type of textile fiber.

Metal materials can be divided into three categories: ferrous, non-ferrous, and ceramic.

Wood can be classified into three types: hardwood, softwood, and composite wood.

Plastic materials are a type of metal material.

Natural stone materials are processed and industrialized by humans.