Chemistry In Our Lives

Question 0

Chemist

Answer 0

A person who actually manufacturers medicine in the laboratory.

Question 1

Pharmacist

Answer 1

Take a doctor’s prescription. He/She also dispenses the medicine.

Question 2

Pharmacy

Answer 2

A pharmacy is the building a pharmacist works in.

Question 3

Rubber

Answer 3

Naturally occurring plastic. [comes from a tree in South America called a Rubber Tree]

Question 4

Natural materials

Answer 4

Silk, crude oil, cotton and fur.

Question 5

Synthetic materials

Answer 5

Means artificial or man-made. They are made in a laboratory.

Question 6

Examples of synthetic materials

Answer 6

Nylon (tights), polyester (shirts), polythene (plastic bags), glass (glasses), terylene (crease free clothes), acrylic (yarn), melamine (plastic plates).

Question 7

Plastics are made from

Answer 7

Crude oil. It is a man-made substance.

Question 8

Fossil fuels

Answer 8

Are formed form the remains of plants and animals that lived millions of years ago, eg. coal, oil and gas.

Question 9

Hydrocarbons

Answer 9

All fossil fuels are made from hydrocarbons.

Question 10

Methane

Answer 10

Natural gas is mainly methane (CH4).

Question 11

Fossil fuels produce

Answer 11

Carbon dioxide (CO2) and water (H2O) when burned.

Question 12

Sulfur dioxide

Answer 12

Some fossil fuels, coal and oil, contain sulfur compounds which release the gas sulfur dioxide (SO2) on burning.

Question 13

Acid rain

Answer 13

Sulfur dioxide combines with rainwater to form sulfur acid, causing acid rain.

Question 14

Acid rains harm

Answer 14

Kills fish, is harmful to plants and erodes limestone buildings.

Question 15

A substance that burns in oxygen to produce heat..

Answer 15

..is called a fuel.

Question 16

Fire Triangle: For a fire to happen you need..

Answer 16

Fuel, Heat and Oxygen.

A fire can be put out by removing one of these or using water, sand, carbon dioxide.

Question 17

Properties of plastic..

Answer 17

Easily moulded, durable, waterproof, hard or soft forms, easy to clean, lightweight, insulator, won’t conduct electricity.

Question 18

Polythene

Answer 18

Tough waxy plastic used around electric cables and for plastic bags.

Question 19

Polystyrene

Answer 19

Packaging, drinking cups, also for insulation in cavity walls of houses.

Question 20

PVC

Answer 20

Drains and pipes, cladding on the walls of houses.

Question 21

Monomers

Answer 21

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

Question 22

Polymers

Answer 22

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

Question 23

Advantage of Synthetic Materials

Answer 23

They are lighter, may be cheaper and are easier to look after.

Question 24

Disadvantage of Synthetic Materials

Answer 24

Non-biodegradable. (can be overcome by recycling or reusing the plastics)