C4-6 Types of Materials

Which of these is NOT a type of material we have studied for this unit (C4)?

• ceramic

• alloys

• co-rodinates

• composites

How are ceramics made?

• by baking substances such as clay

• by embedding one material in another

• by mixing metals together

• by layers individual sheets of materials

Which TWO words describe ceramics?

• Brittle

• Opaque

• Stiff

• Alloys

What is a composite material?

• reinforced with fibreglass

• superimposed one inside another

• nanoparticle sized (10-9m)

• one material embedded in another

Complete the sentence:-

An alloy is a ... of a metal and at least one other element.

Gold alloys are used to make jewellery. Metals such as zinc copper and silver are added to the gold. Why are they added?

• They harden the gold

• They make the gold more shiny

• They lower the density

• They are less reactive with water

Aluminium alloys are used the male aircraft. What is the reason aluminium alloys are used rather than pure aluminium?

• Aluminium is too light

• Aluminium is too soft

• Aluminium corrodes

• Aluminium is too reactive

Which of the following shows an alloy?

• 
• 
• 
• 

Stainless steel is an alloy of iron that does not rust.

Which two metals are added to iron to make stainless steel?

• carbon

• chromium

• nickel

• titanium

Steel is an alloy of iron and carbon.

Which of the following is NOT a reason steel is used instead of iron?

• steel is harder

• iron rusts

• the colour lasts longer

• steel is stronger