Useful and Harmful Materials

These are the qualities of wood, except

• hard and long-lasting

• flexible

• resists electricity and heat

• absorbs sound

• elastic

Rubber has the following properties, except

• strong and durable

• elastic

• waterproof

• adhesiveness and electrical resistance

• absorbs sound

These are combinations of 2 or more metals that result in an improved property of the metal.

• alloys

• steel

• stainless steel

• bronze

This is used in construction and is usually made up of iron and coal.

• alloys

• steel

• stainless steel

• bronze

When chromium is added to steel, it becomes this.

• alloys

• steel

• stainless steel

• bronze

This is made of copper and tin. This is used to make weapons and ornaments.

• alloys

• steel

• stainless steel

• bronze

Plastic products are synthetically made from oil or coal by converting the natural products into this.

• alloys

• titanium

• polymers

• plastic

These are made of clay shaped into desired forms and hardened in a high-temperature oven called kiln.

• ceramics

• titanium

• polymers

• plastic

This is made by melting a mixture of sand and other minerals in a furnace and then cooling it afterward. When made properly, it is strong, transparent, and waterproof.

• glass

• plastic

• ceramics

• steel

This is made by weaving or knitting the threads of different fibers, which can either be natural or synthetic.

• glass

• composite materials

• ceramics

• fabric