Quiz 15: WS10.5 Answers

Kowloon Tong School (Secondary Section)

F.2 Integrated Science Quiz 15 WS10.5

Words Translation (7 marks)

	Chinese term	English term
1	酸雨	Acid rain
2	二氧化硫	Sulphur dioxide
3	氮氧化物	Nitrogen oxides
4	溶解	Dissolve
5	發電廠	Power station
6	硫	Sulphur
7	催化反應器	Catalytic converter

Fill in the Blanks (11 marks)

1        Rainwater with the pH value below 5.6 is regarded as (1)acid rain. It is mainly caused the

pollutant gases like (2)sulphur dioxide and (3)nitrogen oxides.

2        The pollutant gases (4)dissolve in tiny water droplets in the air to form acidic clouds.

3        When coal and fuels obtained from petroleum are burnt in traditional (5)power staion

and factories, pollutant gases are released.

4        Acids have (6)corrosive effects on some metals and building materials. They may

also damage leaves and make plants unable to carry out (7)photosynthesis.

5        Many fish and plants (8)die if the pH value of water drops below 5.

6        To reduce the emission of acidic pollutant gases, we should use alternative energy sources like

(9)solar / nuclear and wind power.

7.        For driving, we should use high-grade fuels with a low (10) sulphur contents.

We can also use (11)catalytic converter to reduce pollutants from the exhaust gas of motor vehicles.

Challenging Questions (Bonus 2 marks)

1.      Suggest how you can determine whether the rainwater is acid rain or not.

I can use pH paper / universal indicator to test the rainwater.

2.      What happens if the acidic rainwater drops on the marble floor?

The marble floor will be corroded / carbon dioxide may be given out.