F2 IS 2nd term QZ 08 (10.5) ans

Word Translation (10 marks)

i    Write down the English terms of the following Chinese terms:

	Chinese term	English term
1	酸雨	Acid rain
2	污染物	Pollutant
3	硫 / 二氧化硫	Sulphur / Sulphur dioxide
4	氮氧化合物	Nitrogen oxides
5	溶解	Dissolve
6	發電廠	Power station
7	燃料	Fuel
8	煤	Coal
9	石油	Petroleum
10	催化轉化器	Catalytic converter

Fill in the Blanks (13 marks)

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

(2) pollutant gases like (3) sulphur dioxide and nitrogen oxides, which are released from

traditional (4) power station and factories.

2        When (5) fuels are burnt in factories, and (6) petroleum are burnt in engines of motor vehicles,

pollutant gases are released. The gases (7) dissolve in tiny water droplets in the air to form acidic clouds in the atmosphere.

3        Acids have (8) corrosive effects on some metals and building materials. They may also damage

leaves and make plants unable to carry out (9) photosynthesis.

4        Many fish and plants die if the pH value of water drops below (10) 5.

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

(11) solar / nuclear / water and wind power.

6        For driving, we should use high-grade fuels with a low (12) sulphur contents. We can also reduce

pollutants from the exhaust gas of motor vehicles by using (13) catalytic converters.

Challenging Questions (Bonus 2 marks)

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

We can use pH meter to determine whether the rainwater has a pH value lower than 5.6 or not.

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

The acidic rainwater may corrode the marble floor.