Resources, chemical analysis

Question 1

Give for uses of resources

Answer 1

To provide warmth, shelter, food and transport

Question 2

What are most resources produced by?

Answer 2

Agriculture (such as cotton)

Question 3

What does modern agriculture allow us to do?

Answer 3

grow enough cotton to fill the needs of the world

Question 4

What can trees be used for?

Answer 4

Timber or fuel (e.g. biofuels such as woodchips)

Question 5

What fuel do most power stations run on?

Answer 5

Biofuel

Question 6

What does agriculture help us do?

Answer 6

Use the earth’s resources more efficeintly

Question 7

Where does natural rubber come form?

Answer 7

The sap of a tree

Question 8

How is synthetic rubber produced?

Answer 8

From crude oil

Question 9

What percent of the rubber from the world is synthetic?

Answer 9

75%

Question 10

What does it mean for a natural resource to be finite

Answer 10

It can be replaced as quick as it is being used

Question 11

How many kilograms of fossil fuels do we burn everyday?

Answer 11

Thousands of kilograms

Question 12

Where are huge amounts of metal extracted from?

Answer 12

The earth’s crust

Question 13

Is wood renewable?

Answer 13

Yes

Question 14

Why should we make human activity sustainable?

Answer 14

So we can meet our needs without preventing future generations from meeting theirs

Question 15

Explain how chemistry plays a part in using the earth’s resources

Answer 15

Artificial fertilisers allow us to grow more food with the land available
. Chemistry also helps us to provide water which is safe to drink
.Processes such as phytomining and bioleaching help us to extract metals more efficiently

Question 16

What does drinking water have to contain?

Answer 16

Sufficiently low levels of dissolved salts such as sodium chloride

Question 17

What is the name for water that is save to drink?

Answer 17

Potable water

Question 18

Why is portable and pure water not the same?

Answer 18

Pure water in the chemical sense contains no dissolved substances where as portable does

Question 19

In the UK where do we get most of our portable water from?

Answer 19

Rain water

Question 20

Why do we use rain water as our portable water?

Answer 20

Cause it contains low levels of dissolved substances

Question 21

Where does rain waiter collect?

Answer 21

Aquifers ,lakes, rivers and reservoirs

Question 22

How do we produce potable water?

Answer 22

We choose a good source of fresh water e.g.
river,
we then pass the water through filter beds to remove seeds and suspended particles,
the water is then sterilised to kill microbes in UK we use chlorine to sterilise

Question 23

What can be used instead of chlorine to sterilise water?

Answer 23

ultraviolet light or ozone

Question 24

Explain why some countries may have to use desalination in order to access potable water?

Answer 24

They may not have access to sources of fresh water, and only to salty water

Question 25

What does desalination do?

Answer 25

Reduces the levels of dissolved minerals to a acceptable level for potable water

Question 26

Give ways to carry out desalination

Answer 26

Distillation

.Reverse osmosis(pass the water through membranes)

Question 27

What do reverse osmosis and distillation require

Answer 27

High amounts of energy hence they are expensive