Chemistry In Our Lives

Question 0

Synthetic materials

Answer 0

Artificial or manmade

Question 1

Natural materials

Answer 1

Wool, water, silk, crude oil, cotton and fur

Question 2

Examples of synthetic

Answer 2

nylon(tights),acrylic(yarn), polyester(shirts)polythene(plastic bags), glass, terylene(crease free clothes), melamine(plastic)

Question 3

Plastics are made from

Answer 3

Crude oil

Question 4

Fossil fuels

Answer 4

Are formed from the remains of plants and animals that lived millions years ago e.g coal and gas

Question 5

Hydrocarbons

Answer 5

All fossil fuels are made mainly of the elements hydrogen and carbon and so are called hydrocarbon

Question 6

Methane

Answer 6

Natural gas (CH4)small four at the bottom

Question 7

Fossil fuels produce

Answer 7

Water and carbon dioxide when burned

Question 8

The gas sulfur dioxide is released

Answer 8

On burning of some fossil fuels which contain sulfur compounds

Question 9

Acid rain

Answer 9

Sulfur dioxide combines with rainwater to form sulfuric acid causing acid rain

Question 10

Acid rain harm

Answer 10

Kills fish, harms plants and erodes limestone buildings

Question 11

Fuel

Answer 11

A substance that burns in oxygen to produce heat

Question 12

Fire triangle

Answer 12

For a fire to happen you need fuel, heat and oxygen

A fire can be put out if you use water, sand or carbon dioxide

Question 13

Properties of plastic

Answer 13

Easily moulded into different shapes
Durable
Waterproof
Soft or hard plastics are available
Easy to clean
Lightweight
Insulators that won't conduct electricity

Question 14

Monomers

Answer 14

Plastics are made from chemicals called monomers, which are taken from crude oil

Question 15

Polymers

Answer 15

The monomers react together to make long chains of molecules called polymers which then behave like plastics

Question 16

Non-biodegradable

Answer 16

Plastics are non-biodegradable (cannot be broken down by living things such as bacteria and fungi in the soil)

Question 17

Advantages of synthetic material

Answer 17

They are often lighter, cheaper, easy to look after

Question 18

Disadvantages of synthetic materials

Answer 18

Non biodegradable

If we reuse or recycle our plastics then this disadvantage can be overcome

Question 19

Polymerisation

Answer 19

Small repeating units called monomers join together to form a large molecule called a polymer

Question 20

Plastics

Answer 20

Polythene -plastic bags, plastic lunch box, bottle Nylon tights,carpets, 
Rigid PVC-
Flexible PVC
Polystyrene 
Expanded polstyrene

Question 21

Rubber

Answer 21

Naturally occurring plastic