Unit 7 : Pollution

Question 1

Why are people experiencing hazardous environmental conditions?

Answer 1

• because of global warming and climate change

Question 2

What is the result of the rise in the amount of greenhouse gases?

Answer 2

• The result of the rise in the amount of greenhouse gases is our planet getting warmer than usual.

Question 2

What are some sources of air pollution?

Answer 2

• are human activities such as fuel burning, logging, farming, mining, manufacturing, and construction of roads and buildings, and natural events such as wildfires and volcanic eruptions.

Question 2

What is the function of the ozone layer?

Answer 2

The function of the ozone layer is to protect the earth from the harmful ultraviolet rays of the sun.

Question 2

Why is the fertility of the earth’s soil being degraded?

Answer 2

• because many factories are disposing of their chemical wastes, which leak into soil layers

Question 3

How does water pollution occur?

Answer 3

Water pollution occurs when different types of waste are dumped into water bodies such as lakes, rivers, seas and oceans.

Question 3

What can happen if we do not do something to combat pollution?

Question 4

How does our body respond to loud noise?

Answer 4

• by accelerating heartbeat and respiration, constricting blood vessels, paling skin and tensing muscles

Question 5

Which animals are active during the night time? What are they called?

Question 6

Mention two possible solutions to reduce the effects of environmental pollution.

Question 7

What is pollution linked to?

Answer 7

Pollution is directly linked to the greenhouse effect.

Question 8

What are some minor gases in the atmosphere?

Answer 8

Some minor gases in the atmosphere are carbon dioxide, methane, nitrous oxide, ozone, fluorinated compounds, and water vapour.

Question 9

What do greenhouse gases act as?

Answer 9

Greenhouse gases act as a blanket in trapping some of the sun’s heat and preventing it from escaping back into space.

Question 10

What is pollution mainly responsible for?

Answer 10

Pollution is mainly responsible for many environmental problems such as global warming and climate change.

Question 11

Mention the types of environmental pollution.

Answer 11

Types of environmental pollution are air, water, soil, noise and light pollution.

Question 12

What can air pollution be defined as?

Answer 12

Air pollution can be defined as ‘the introduction of harmful substances into the air’.

Question 13

What are the human activities that cause air pollution?

Answer 13

The human activities that cause air pollution are fuel burning, logging, farming, mining, manufacturing, and construction of roads and buildings.

Question 14

What are natural events that cause air pollution?

Answer 14

Natural events that cause air pollution are wildfires and volcanic eruptions.

Question 15

What environmental problems does air pollution lead to?

Answer 15

Air pollution leads to environmental problems such as floods, acid rain and ozone depletion.

Question 15

When does acid rain occur?

Answer 15

Acid rain occurs when smoke and fumes from traffic and factories mix with the water vapour in the atmosphere.

Question 16

When does ozone depletion occur?

Answer 16

Ozone depletion occurs when some greenhouse gases like CFCs are released into the atmosphere.

CFCs = chlorofluorocarbons

Question 17

What can air pollutants cause?

Answer 17

Air pollutants can cause many severe health problems such as eye irritation, allergies, asthma and lung cancer.

Question 18

What is water pollution?

Answer 18

Water pollution is the addition of undesirable substances in water.

Question 18

When does water pollution occur?

Answer 18

Water pollution occurs when different types of waste are dumped into water bodies such as lakes, rivers, seas and oceans.

Question 19

What does polluted water include?

Answer 19

Polluted water includes toxic chemicals, bacteria and parasites, which can devastate the ecosystems of aquatic life.

Question 20

What do water pollutants cause?

Answer 20

Water pollutants cause some harmful diseases such as dysentery, diarrhoea and cholera.

Question 21

What is soil pollution?

Answer 21

Soil pollution is the process of making the earth’s topsoil contaminated with hazardous substances.

Question 22

What does deforestation cause?

Answer 22

Deforestation causes soil erosion.

Question 23

What is the result of deforestation/soil erosion?

Answer 23

The result of deforestation/soil erosion is losing millions of tons of topsoil each year.

Question 24

What will unhealthy soil intensify?

Answer 24

Unhealthy soil will intensify the existing threat of food and nutritional insecurity.

Question 25

What is noise defined as?

Answer 25

Noise is defined as ‘unwanted or excessive sound’.

Question 26

What is noise pollution born of?

Answer 26

Noise pollution is born of urbanisation, industrialisation and technological advances.

Question 27

What are the primary sources of noise pollution?

Answer 27

The primary sources of noise pollution are construction sites, industrial areas, forms of transport such as automobiles, trains and aeroplanes, and cultural activities like festivals.

Question 28

What does noise cause?

Answer 28

Noise causes physical and psychological harm, and reduces the quality of life for those who are exposed to it.

Question 29

What can noise cause in the long run?

Answer 29

In the long run, noise can cause hypertension, hearing loss, and emotional problems such as depression, aggression, irritation, frustration and anxiety.