9E Materials Quick Quiz

Which of the following is a ceramic material?

• steel

• glass

• cement

• polythene

Pottery and china are suitable for making tea pots because they are:

• brittle

• transparent

• heat insulators.

• non-conductors of electricity

Which of these statements about the formation of solid crystals is correct?

• Rapid cooling produces the largest crystals as the atoms quickly form molecules.

• Slow cooling produces the largest crystals as the atoms have time to form a regular lattice.

• Rapid cooling produces the largest crystals as it allows more bonds to form in the lattice.

• Slow cooling produces the largest crystals as the atoms can form lots of molecules.

Which of the following shows a substance that would have a high melting point but a brittle structure?

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Which of the following is a synthetic polymer?

• sand

• rubber

• concrete

• PVC

A polymer is formed when:

• monomers join together in chains.

• molecules break up into large atoms.

• single atoms join to make monomers.

• long chains break up to form molecules.

Some polymerisation reactions are endothermic. What does this mean?

• The polymers are made by burning oil.

• The formation of the polymers transfers heat into the surroundings.

• The polymers are made by breaking up long chain molecules.

• The formation of the polymers makes the surrounding temperature decrease.

The diagram shows how the atoms in the rubber chains are joined together in natural rubber. Vulcanisation is the process of adding cross-links to sulfur. How does this process change the natural properties of the rubber?

• It makes the rubber softer but it is still easy to melt.

• It makes the rubber harder and easy to melt.

• It makes the rubber harder but it is still elastic

• It makes the rubber more flexible and easier to melt.

Which of the following is a composite material?

• glass

• plywood

• poly(styrene)

• silicon dioxide

Why is concrete described as a composite material?

• because it is made with cement

• because it sets hard and is strong

• because it combines two or more materials

• because it is made by mixing lots of different materials with water