MATERIALS
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Use
these questions to help you revise. |
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QUESTIONS |
ANSWER BOX |
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1. |
Which
materials in this list are found naturally? wood, slate, polythene,
nylon, stone. |
Wood,
slate, stone. |
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2. |
Which
of these words could describe the properties of a material? big, hard,
shiny, round, dense. |
Hard shiny, dense. |
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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 |
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4. |
What
is another name for materials which are made |
Synthetic. |
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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. |
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6. |
A
chemical _________ takes place when raw materials are changed into new
materials. |
reaction. |
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7. |
What
raw materials are used to make most plastics? |
Coal, crude oil, and natural gas. |
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8. |
Name
three fossil fuels |
Coal, crude oil and natural gas. |
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9. |
What
raw material do we get petrol from? |
Crude oil. |
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10. |
What
is the test for carbon dioxide? |
Lime water goes milky (cloudy). |
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11. |
Which
materials from this list are flexible? (bendy) sponge, concrete,
glass, rubber. |
Sponge and rubber |
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12. |
Why
is concrete used for pavements? |
It is hard (strong), and doesn't wear out easily. |
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13. |
Why
is glass used for windows? |
It
is transparent (see through). |
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14. |
Give
2 reasons why wellington boots are made from rubber. |
Rubber is waterproof and flexible (bend) |
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15. |
Why
are electrical wires often coated in plastic? |
Plastic is a good insulator (doesn't let electricity pass through it). |
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16. |
Why
is air used to inflate car tyres? |
To
give a smooth ride (absorb
shock) and because it's cheap. |