Question 1:
Diagram 1.1 shows a type of an environmental pollution in an industrial area.


(a)(i) Based on Diagram 1.1, what is released by the factory? [1 mark]

(a)(ii) State the type of pollution based on the answer in (a)(i). [1 mark]

(b) State the effect of pollution shown in Diagram 1.1 on human being. [1 mark]

(c) Suggest one method to control the pollution shown in Diagram 1.1. [1 mark]


(d) Diagram 1.2 shows the effect of environmental pollution due to the heat trapped by gas P.

(i) Name gas P. [1 mark]
(ii) Name the phenomenon shown in Diagram 1.2. [1 mark]


Answer:
(a)(i) Thick black smoke (soot)

(a)(ii) Air pollution

(b) The acidic gases in the smoke irritate and corrode the respiratory passage (causing asthma and bronchitis)

(c) Fit electrostatic precipitators on the chimneys to attract the soot to the inner wall of the chimneys.

(d)(i) Carbon dioxide

(d)(ii) Global warming/ Greenhouse effect

Question 2:
Diagram 2 shows the atmospheric layer around the Earth.


(a)(i) What is layer K? [1 mark]

(ii) State the importance of layer K. [1 mark]

(b)(i) Name the substance which can damage layer K. [1 mark]

(ii) Name one appliance that releases the substance in (b)(i). [1 mark]

(c) State two effects if layer K is damaged. [2 marks]


Answer:
(a)(i) Ozone layer

(a)(ii) Absorbs harmful ultraviolet rays in sunlight

(b)(i) Chlorofluorocarbon (CFC)

(b)(ii) Aerosol spray

(c)
1. Ultraviolet ray reaching the Earth can cause skin cancer and cataract
2. Ultraviolet ray lower our body’s immunity to diseases.