Polymers, ceramics, metals, & composites

What does 'brittle' mean?

• Soft
• Easily breakable
• Easily bendable
• Tough

Which of these properties do ceramics possess?

• Light
• Very fragile
• Strong hardness
• Flexible

What is a disadvantage of ceramics?

• Ceramics are tough. 
• Clay is easy to obtain.
• They can be painted.
• They can fracture easily.

What is a polymer?

• a group of atoms
• a long chain molecule with identical group of atoms
• a long chain of molecules
• a long chain of different atoms

A polymer made in the laboratory (or industry) usually made from petrochemicals

• nature polymer

• natural polymer

• protein

• synthetic polymer

What does PVC stand for?

• Poly Vinyl Chemical

• Poly Vinyl Carbon

• Poly Vinyl Chloride

• Poly Vinyl Carbonate

What is the definition of a composite?

• Composites are when you weld two or more metals together to form a new type of metal.

• Composites are a combination of two or more materials that are bonded together to improve their mechanical or physical properties.

• Composites are when you take 2 or more metals and fuse them through melting.

• Composites are when you take 2 or more matrix and mix them to create a new material.

A composite material is made of 

• A single material
• Two or more separate materials
• Two or more chemically combined materials
• None of these

A problem with modern composites is that they

• can be lightweight

• are expensive

• can be molded into shapes

Which of these is a property of metals?

• It's malleable
• It can't conduct electricity
• They are used in food
• It's very brittle