(1) Which of the following is not a greenhouse gas ?
A. Carbon dioxide
B. Sulphur dioxide
C. Methane
D. Nitroen
(2) What is the percentage of Oxygen in the air?
A 12%
B.21%
C 78%
D. 35%
(3) The proportion of which gas is the highest in air ?
A Oxygen
B. Hydrogen
C. Nitrogen
D. ozone
(4) Where are chlorofluorocarbons used ?
A. Refrigerator
B. Air - conditioner
C. Aerosol spray
D. All of the given
(5) Which air pollutant reduces the oxygen carrying capacity of the blood ?
A. CO
B. CO²
C. SO²
D. NO²
(6) Who damages the ozone layer of the atmosphere ?
A. Sun
B. UV rays
C. CFCs
D. CO
Answers
Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's metabolic activities.
Oxygen is a byproduct of photosynthesis and, correspondingly, carbon dioxide the byproduct of respiration.
Photosynthesis is a process by which phototrophs convert light energy into chemical energy, which is later used to fuel cellular activities. The chemical energy is stored in the form of sugars, which are created from water and carbon dioxide.
The main purpose of photosynthesis is to convert radiant energy from the sun into chemical energy that can be used for food. Cellular respiration is the process that occurs in the mitochondria of organisms (animals and plants) to break down sugar in the presence of oxygen to release energy in the form of ATP.
1. Sulphur dioxide
2. 21%
3. Nitrogen
4. All of the above
5. CO
6. CFCs
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