Tag: atmosphere- wind

Questions Related to atmosphere- wind

Typically, water vapor occupies about what percentage of the air's volume near the earth's surface?

  1. About 78 percent

  2. About 21 percent

  3. Close to 10 percent

  4. Less than 4 percent


Correct Option: D

At which latitude heat gain through insolation approximately equals heat loss through terrestrial radiation:

  1. $22.5^0$ North and South

  2. $40^0$ North and South

  3. $42.5^0$ North and South

  4. $66^0$ North and South


Correct Option: D

Land and water dwelling plants, may suffer from

  1. Ultraviolet radiations

  2. Pollutions

  3. Air pollution

  4. Pollutants


Correct Option: A

If climate change keeps on disrupting atmospheric pressure, it would bring ice age in

  1. America

  2. Northern Europe

  3. Africa

  4. Canada


Correct Option: B

The $CO _{2}$ content by volume, in the atmospheric air is about

  1. 3.34%

  2. 4%

  3. 0.0314%

  4. 2.1%.


Correct Option: C
Explanation:

The carbon dioxide present in the atmosphere is generally the result of respiration by animals during the day and the emissions by various vehicles, industries and machines. All these activities account for a total of approximately 0.04% CO2 in the atmospheric air.

So, the correct answer is '0.0314%'.

Ozone is formed in stratosphere by action of ultravoilet radiations on oxygen.

  1. True

  2. False

  3. Either

  4. Neither


Correct Option: A
Explanation:
Ozone (O3) molecule is made up of three oxygen atoms. It is formed in the stratosphere when single oxygen atom combines with a molecule of oxygen i.e. when [O] combines with O2. Oxygen molecule consisting of two oxygen atoms splits into atomic oxygen in the presence of ultraviolet radiation. The atomic oxygen then combines with another molecule of oxygen to form ozone.
The reactions are as follows:
      UV light
O2 ---------------> [O] + [O]
[O] + O2 ---------->O3
Hence, the statement given in the question is correct.
So, the correct answer is 'True'.

Closest atmospheric layer to earth's surface is known as

  1. Boundary Layer

  2. Atmosphere

  3. Biosphere

  4. Hydrosphere


Correct Option: A

What is lower layer of atmosphere called?

  1. Ionosphere

  2. Mesosphere

  3. Troposphere

  4. Stratosphere


Correct Option: A