Formative Practice 7.3 – Science Form 1 Chapter 7

Question 1:
What are the pollutants that can cause haze?

Answer:
Smoke and dust.

Question 2:
As a student, how can you increase the awareness of air pollution in the community?

Answer:
(a) Organise awareness campaign on air pollution.

(b) Encourage the habit of recycling among citizens.

(c) Listen to talks on the danger of air pollution (accept any suitable answers)

Question 3:
Give three reasons why it is important to keep the air clean.

Answer:
(a) Humans can stay healthy.

(b) Reduce the cost of repairing damaged buildings caused by acid rain.

(c) Earth’s climate will be better.

Question 4:
Littering can also cause air pollution. Explain how littering causes air pollution.

Answer:
Rubbish can cause the increase of microorganisms in the air.

Question 5:
Match each pollutant to its effect.


Answer:
(i) Carbon dioxide – greenhouse effect

(ii) Nitrogen dioxide – acid rain

(iii) Chlorofluorocarbons – thinning of the ozone layer

Question 6:
Tick (✓) the correct statement on how to control and reduce air pollution.
(a) Use materials free of chlorofluorocarbons (CFC).  [ ]
(b) Use public transport.  [ ]
(c) Conduct open burning.  [ ]
(d) Practise reusing and recycling items.  [ ]
(e) Use petrol and diesel that contain lead.  [ ]

Answer:
(a) ✓
(b) ✓
(c)
(d) ✓
(e)