F1-2 science 7.4-7.7 multiple choice

B

Which of the following descriptions of the difference between inhaled air and exhaled air is correct?

A Inhaled air contains more carbon dioxide than exhaled air.

B Inhaled air contains more oxygen than exhaled air.

C Inhaled air contains more water vapour than exhaled air.

D Inhaled air contains more nitrogen than exhaled air.

D

Which of the following correctly shows the passage of air flowing out of the lungs when we breathe out?

A Trachea - air sacs - bronchi

B Trachea - bronchi - air sacs

C Air sacs - trachea - bronchi

D Air sacs - bronchi - trachea

C

Which of the following about the gas exchange in plants is / are correct?

(1) There is no photosynthesis at night.

(2) There is no respiration during the day.

(3) There is a net release of oxygen if the rate of photosynthesis is higher than that of respiration.

A (1) only

B (2) only

C (1) and (3) only

D (2) and (3) only

C

The diagram below shows part of the human breathing system. The action of which structure(s) brings about breathing?

A (1) only

B (2) only

C (1) and (3) only

D (2) and (3) only

D

Which of the following is NOT the possible effect of global warming to the Earth?

A Rise of sea level

B More frequent and stronger typhoon

C Change of rainfall pattern

D More frequent and stronger earthquake

D

Which of the following combinations of air pollutant and its effect to our body are correct?

(1) Sulphur dioxide - Worsen bronchitis

(2) Carbon monoxide - Cause dizziness

(3) Ozone - Worsen asthma

A (1) and (2)only

B (1) and (3) only

C (2) and (3) only

D (1), (2) and (3)