Which of the following statements is/are correct? 1. Air close to the Earths surface heavier. 2. Air close to the Earths surface contains larger quantity of water vapoor and dust particles Select the correct answer using the code given below :

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Q: 63 (NDA-II/2013)

Which of the following statements is/are correct?
1. Air close to the Earth’s surface heavier.
2. Air close to the Earth’s surface contains larger quantity of water vapoor and dust particles
Select the correct answer using the code given below :

question_subject: 

Geography

question_exam: 

NDA-II

stats: 

0,21,3,1,2,21,0

keywords: 

{'dust particles': [0, 1, 1, 1], 'air': [1, 0, 0, 0], 'water vapoor': [0, 0, 0, 1], 'surface': [1, 0, 0, 0], 'earth': [0, 1, 1, 1], 'larger quantity': [0, 0, 0, 1]}

Option 1 states that air close to the Earth`s surface is heavier, and this statement is correct. Air closer to the Earth`s surface is denser due to the weight of the air above it. This is why we feel air pressure, as the weight of the air molecules above us pushes down.

Option 2 states that air close to the Earth`s surface contains a larger quantity of water vapor and dust particles, and this statement is also correct. This is because water vapor and dust particles tend to be concentrated closer to the ground. Water vapor can often be found closer to the surface due to evaporation from bodies of water or from transpiration by plants. Dust particles can also settle closer to the surface due to gravity.

Therefore, both statements 1 and 2 are correct. Air close to the Earth`s surface is heavier due to the weight of the air above it, and it also contains a larger quantity of water vapor and dust particles.

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