F2 IS QZ 05 (7.4) ans

7.4

Word Translation (8 marks)

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

	Chinese term	English term
1	副產品	By-product
2	葉綠素	Chlorophyll
3	光合作用	Photosynthesis
4	原料	Raw materials
5	澱粉	Starch
6	碘液試驗	Iodine test
7	脫澱粉	Destarch / Destarching
8	鹼石灰	Soda lime

Fill in the Blanks (16 marks)

1      Green plants can make their own food by photosynthesis(1), during which light(1) energy is absorbed by chlorophyll(1) in green leaves. The word equation of this process is: (6)

                                                  Light energy

Water + Carbon dioxide -------------------à Food / starch + Oxygen

                                          Chlorophyll

2      The food produced is usually stored in the form of starch(1). And oxygen is produced as a by-product(1).

3      Iodine(1) test can be used to find out whether photosynthesis has been taken place in a leaf. In this test, a colour change from brown to dark-blue(1) shows the presence of starch(1).

4      Destarching(1) is the process of removing starch from the leaves by putting the plant in the dark for one or two days.

5      Soda lime(1) is a chemical that can absorb carbon dioxide in air.

Challenging Questions (Bonus 2 marks)

List TWO necessary conditions for photosynthesis to take place.

Any TWO of the following:

Carbon dioxide / water / light / chlorophyll