F2 IS QZ 07 anwers

Marks: =       /19 =    %

1st Term QZ 07 Submission date：_____________ Name：______________________ Class & no.：2 _________(     )

7.5

Word Translation (6 marks)

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

	Chinese term	English term
1	氣體交換	Gaseous exchange
2	肺	Lung
3	呼吸作用	Respiration
4	光合作用	Photosynthesis
5	溫室效應	Greenhouse effect
6	全球暖化	Global warming

Fill in the Blanks (8 marks)

1      Breathed air contains more carbon dioxide (1) and less oxygen (1) than unbreathed air.

2      Gaseous exchange (1) occurs continuously between living things and the environment, through which living things take in oxygen (1) from and release carbon dioxide (1) to the environment. In humans, this process occurs inside the lungs (1).

3      Some of the heat from the Sun is trapped by certain gases in the atmosphere. This is known as the greenhouse effect (1). This effect is now excessive, leading to the average temperature of the atmosphere to rise. This phenomenon is known as global warming (1).

Multiple Choice (5 marks)

Circle the letter of the best answer for each question.

Direction: The following diagram shows the set-up of an experiment on the gaseous exchange of a grasshopper with the surroundings. Refer to the diagram and answer questions 1 to 4.

1.      Which of the following is most likely to happen to the red ink marker five minutes later?

A.   Moves to the left

B.   Moves to the right

C.   Does not move

D.   Evaporates
2.     What is the most probable reason for the above result to occur?

A.   The amount of oxygen inside the boiling tube increases.

B.   The amount of oxygen inside the boiling tube decreases.

C.   The amount of carbon dioxide inside the boiling tube increases.

D.   The amount of carbon dioxide inside the boiling tube decreases.

3.      Which of the following best explains your answer in part (b)?

A.   Soda lime absorbs carbon dioxide.

B.   Soda lime does not absorb oxygen.

C.   The grasshopper consumes oxygen in respiration.

D.   The grasshopper releases carbon dioxide in respiration.

4.      Why do we put the wire gauze inside the boiling tube?

A.   To avoid the grasshopper from consuming too much oxygen

B.   To avoid the grasshopper from releasing too much carbon dioxide

C.   To avoid the grasshopper from eating the soda lime

D.   To avoid the grasshopper from touching the soda lime

5.      Which of the following are the effects of global warming?

(I)   Extensive melting of ice in polar regions

(II) The ‘hole’ of ozone in the atmosphere enlarges

(III) Lowlands are covered up by seawater

A.   (I) and (II) only

B.   (I) and (III) only

C.   (II) and (III) only

D.   (I), (II) and (III)

Challenging Questions (Bonus 2 marks)

Why is it not good to place potted plant in our bedroom especially at night?

In the dark, green plants do not carry out photosynthesis but carry out respiration only. Therefore, there is a net intake of oxygen and net release of carbon dioxide. This will reduce the oxygen in air that we need.