Sci 7.7 Air Quality Past Paper PDF

Living things and air _S=5tn ard 7.7 Air quality = Textbook p. 76-81 Level1 () Fill in the blanks (1 mark each, total 4 marks) Fill in the blanks below with the words given....

Living things and air _S=5tn ard 7.7 Air quality = Textbook p. 76-81 Level1 () Fill in the blanks (1 mark each, total 4 marks) Fill in the blanks below with the words given. carbon dioxide nitrogen oxides pollutants fossil fuels five ten 1 Burning of © in power stations, factories and motor cars releases various Q to the air. This is a major cause of air pollution in many places. — 2 High levels of sulphur dioxide and @ in air can irritate our lungs. 3 In Hong Kong, the AQHIs are grouped into @ categories. ® (G) True or false (1 mark each, total 4 marks) oc 6a™3 Write ‘T’ for a true statement and ‘F’ for a false statement in the boxes provided. (0) 1 Carbon dioxide is a major air pollutant in Hong Kong. uojisanb Bupjuiyy 2 Inhaling carbon monoxide may cause dizziness and headaches. BB 1opio-ybiIH 3 The higher the AQHI, the lower the health risks caused by air pollutants. 4 The general public does not need to take actions when the AQHI falls into the ‘high’ category. |] 27  © Multiple-choice (1 mark each, total 2 marks) 1 Which of the following are the effects of high levels of ozone in air on our health? ~ (1) Irritate our eyes. no (2) Irritate our airways. (3) Worsen asthma. | A (1) and (2) only B (1) and (3) only ~ tw C (2) and (3) only D (1), (2) and (3) nH 2 Which of the following ways can help improve air quality? i. (1) Switch to electric cars. hS (2) Use wind power to generate electricity. (3) Keep the air-conditioned temperature at 25.5 °C in summer. A (1) and (2) only B (1) and (3) only J tn C (2) and (3) only D (1), (2) and (3) HN ( Structured question (4 marks) Mr Lee is watching the weather report on television. Na a State the purpose of the AQHI. ir (2 marks) Ee} " b Give the health risk category AQHI 9 belongs to. (1 mark) SQ a3 29 &» 0] ¢ Mr Lee has bronchitis. Suggest what he should do on that day. (1 mark) =) 3 28 Marks (p. 27-28): / 14