Tag: natural resources - air

Questions Related to natural resources - air

Multiple choice biology natural disasters: winds, storms and cyclones composition of air introduction to air natural resources - air

Most abundant constituent of dry air in terms of volume is:

  1. carbon dioxide

  2. helium

  3. nitrogen

  4. oxygen

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The most abundant gas in the Earth's atmosphere is nitrogen, which accounts for about 78% of the mass of dry air. 

Oxygen is the next most abundant gas, present at levels of 20 to 21%. 
Although humid air seems like it contains a lot of water, the maximum amount of water vapour that air can hold is only about 4%.

Hence, the correct option is $\text{C}$

Multiple choice biology natural disasters: winds, storms and cyclones composition of air introduction to air natural resources - air

Which of the following constituent gas is not directly used by the living beings?

  1. Oxygen

  2. Nitogen

  3. Hydrogen

  4. Carbon dioxide

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nitrogen gas cannot be used by the human beings directly, breathing pure nitrogen means we're not breathing oxygen, which means that we'll die of oxygen deprivation in a matter of minutes
Hence option B is correct.