Chemistry 5 9E Making And Using Materials Flashcards Preview

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Flashcards in Chemistry 5 9E Making And Using Materials Deck (15)
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1

Which materials from the list are flexible (bendy)

Sponge concrete glass rubber

Sponge and rubber

2

Why is concrete used for pavements?

It is hard (strong)

3

Why is glass used for windows?

It is transparent (see through)

4

Which materials from this list are shiny, good conductors of electricity and only melt at high temperatures?

Copper, polythene, oil, gold

Copper and gold

5

Why are electrical wires coated in plastic?

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

6

What is the name given to a substance that cannot be made any simpler?

An element

7

What is another name for materials that are "made"

Synthetic

8

Which are natural and which are man made out of the following?

Polyester, cotton, silk, nylon, wool, acrylic

Natural - cotton, silk, wool

Made - polyester, nylon and acrylic

9

Which materials are found naturally?

Wood, slate, polythene, nylon, stone

Wood, slate and stone

10

Give two reasons why wellies are made from rubber?

Rubber is waterproof and flexible (bendy).

11

What raw material do we get petrol from?

Crude oil.

12

What raw materials are used to make most plastics?

Coal, crude oil and natural gas

13

Name two substances that can be recycled

Glass, paper or aluminium

14

What substances can be added to soil to help plants grow?

Fertilisers.

15

Which of these materials could describe the properties of a material:

Big, hard, shiny, round, dense

Hard, shiny, dense