MATERIALS

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QUESTIONS

ANSWER BOX

1.

Which materials in this list are found naturally? wood, slate, polythene, nylon, stone.

Wood, slate, stone.

2.

Which of these words could describe the properties of a material? big, hard, shiny, round, dense.

Hard shiny, dense.

3.

Which materials from this list are shiny, good conductors of electricity and only melt at high temperatures? copper, polythene, oil, gold.

Copper and gold

4.

What is another name for materials which are made

Synthetic.

5.

Write down which are the natural and which are the made materials from this list: polyester, cotton, silk, nylon, wool, acrylic.

Natural - cotton silk and wool.

6.

A chemical _________ takes place when raw materials are changed into new materials.

reaction.

7.

What raw materials are used to make most plastics?

Coal, crude oil, and natural gas.

8.

Name three fossil fuels

Coal, crude oil and natural gas.

9.

What raw material do we get petrol from?

Crude oil.

10.

What is the test for carbon dioxide?

Lime water goes milky (cloudy).

11.

Which materials from this list are flexible? (bendy) sponge, concrete, glass, rubber.

Sponge and rubber

12.

Why is concrete used for pavements?

It is hard (strong), and doesn't wear out easily.

13.

Why is glass used for windows?

It is transparent (see through).

14.

Give 2 reasons why wellington boots are made from rubber.

Rubber is waterproof and flexible (bend)

15.

Why are electrical wires often coated in plastic?

Plastic is a good insulator (doesn't let electricity pass through it).

16.

Why is air used to inflate car tyres?

To give a smooth ride (absorb shock) and because it's cheap.