9E: MATERIALS AND POLYMERS

Characteristics of Ceramics

• Hard, stiff, strong and brittle

• High melting points and isolator of heat and electricity

• Very unreactive

• Very reactive

• Conductor of heat and electricity

The raw materials for making pottery is…

• Sand

• Clay

• Bricks

• Glass

The raw materials for making glass is…

• Sand

• Clay

• Bricks

• Glass

Faster cooling produces large crystals to form a lattice structure.

• True

• False

In a lattice structure there are a … number of atoms.

• Large

• Small

• Normal

• No

This is known as a …

• Strong bonds

• Metal crystals

• Lattice structure

• Freezing ceramics

Lattice structure are joined by …

• Strong bonds

• Weak bonds

• Elastic bonds

• Magnetic force

The high strength of the bonds is the reason why ceramics has low melting points.

• True

• False

Polymers are made out of …

Some examples of polymers are …

• PVC

• Rubber

• CFC

• Teflon

• Nylon