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Question 1 of 5
1. Question
Consider the following statements regarding Rossby waves.
- They are a type of inertial wave naturally occurring in rotating fluids.
- In planetary atmospheres, they are due to the variation in the Coriolis effect with latitude.
Which of the above statements is/are correct?
Correct
Solution: c)
Rossby waves, also known as planetary waves, are a type of inertial wave naturally occurring in rotating fluids. They were first identified by Carl-Gustaf Arvid Rossby. They are observed in the atmospheres and oceans of planets owing to the rotation of the planet.
Rossby Waves
- The meandering jet streams are called Rossby Waves.
- Rossby waves are natural phenomenon in the atmosphere and oceans due to rotation of earth.
- In planetary atmospheres, they are due to the variation in the Coriolis effect (When temperature contrast is low, speed of jet stream is low, and Coriolis force is weak leading to meandering) with latitude.
- Rossby waves are formed when polar air moves toward the Equator while tropical air is moving poleward.
- The existence of these waves explains the low-pressure cells (cyclones) and high-pressure cells (anticyclones).
Incorrect
Solution: c)
Rossby waves, also known as planetary waves, are a type of inertial wave naturally occurring in rotating fluids. They were first identified by Carl-Gustaf Arvid Rossby. They are observed in the atmospheres and oceans of planets owing to the rotation of the planet.
Rossby Waves
- The meandering jet streams are called Rossby Waves.
- Rossby waves are natural phenomenon in the atmosphere and oceans due to rotation of earth.
- In planetary atmospheres, they are due to the variation in the Coriolis effect (When temperature contrast is low, speed of jet stream is low, and Coriolis force is weak leading to meandering) with latitude.
- Rossby waves are formed when polar air moves toward the Equator while tropical air is moving poleward.
- The existence of these waves explains the low-pressure cells (cyclones) and high-pressure cells (anticyclones).
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Question 2 of 5
2. Question
Consider the following statements.
- Frost forms on cold surfaces when condensation takes place below freezing point
- The difference between the mist and fog is that fog contains more moisture than mist.
- Mists are frequent over mountains as the rising warm air up the slopes meets a cold surface.
Which of the above statements is/are correct?
Correct
Solution: b)
Frost:
- Frost forms on cold surfaces when condensation takes place below freezing point, i.e. the dew point is at or below the freezing point.
- The excess moisture is deposited in the form of minute ice crystals instead of water droplets. The ideal conditions for the formation of white frost are the same as those for the formation of dew, except that the air temperature must be at or below the freezing point.
Fog and Mist:
When the temperature of an air mass containing a large quantity of water vapour falls all of a sudden, condensation takes place within itself on fine dust particles. So, the fog is a cloud with its base at or very near to the ground. Because of the fog and mist, the visibility becomes poor to zero. In urban and industrial centres smoke provides plenty of nuclei which help the formation of fog and mist. Such a condition when fog is mixed with smoke, is described as smog.
The only difference between the mist and fog is that mist contains more moisture than the fog. In mist each nuceli contains a thicker layer of moisture.
Mists are frequent over mountains as the rising warm air up the slopes meets a cold surface.
Fogs are drier than mist and they are prevalent where warm currents of air come in contact with cold currents.
Incorrect
Solution: b)
Frost:
- Frost forms on cold surfaces when condensation takes place below freezing point, i.e. the dew point is at or below the freezing point.
- The excess moisture is deposited in the form of minute ice crystals instead of water droplets. The ideal conditions for the formation of white frost are the same as those for the formation of dew, except that the air temperature must be at or below the freezing point.
Fog and Mist:
When the temperature of an air mass containing a large quantity of water vapour falls all of a sudden, condensation takes place within itself on fine dust particles. So, the fog is a cloud with its base at or very near to the ground. Because of the fog and mist, the visibility becomes poor to zero. In urban and industrial centres smoke provides plenty of nuclei which help the formation of fog and mist. Such a condition when fog is mixed with smoke, is described as smog.
The only difference between the mist and fog is that mist contains more moisture than the fog. In mist each nuceli contains a thicker layer of moisture.
Mists are frequent over mountains as the rising warm air up the slopes meets a cold surface.
Fogs are drier than mist and they are prevalent where warm currents of air come in contact with cold currents.
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Question 3 of 5
3. Question
Consider the following statements regarding Damodar River
- Damodar occupies the eastern margins of the Chotanagpur Plateau.
- It flows through a rift valley
- Barakar and Sharda are its main tributaries.
Which of the above statements is/are correct?
Correct
Solution: a)
Damodar occupies the eastern margins of the Chotanagpur Plateau where it flows through a rift valley and finally joins the Hugli. Barakar is its main tributary.
The Sharda River or Mahakali River is also called Kali Gad or Kali Ganga in Uttarakhand where the river demarcates Nepal’s western border with India.
Incorrect
Solution: a)
Damodar occupies the eastern margins of the Chotanagpur Plateau where it flows through a rift valley and finally joins the Hugli. Barakar is its main tributary.
The Sharda River or Mahakali River is also called Kali Gad or Kali Ganga in Uttarakhand where the river demarcates Nepal’s western border with India.
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Question 4 of 5
4. Question
Which of the following pairs given below is/are correctly matched?
Mountain State
- Abor Hills Sikkim
- Mikir Hills Assam
- Garhjat Hills Odisha
Select the correct answer code:
Correct
Solution: c)
The Abor Hills is in Arunachal Pradesh.
Incorrect
Solution: c)
The Abor Hills is in Arunachal Pradesh.
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Question 5 of 5
5. Question
Consider the following statements regarding Dew point.
- Dew point is the temperature at which the atmosphere is saturated with water vapour.
- The dew point gives an indication of the humidity.
- A higher dew point means there will be less moisture in the air.
Which of the above statements is/are correct?
Correct
Solution: d)
Dew point, the temperature at which the atmosphere is saturated with water vapour, when it is cooled without changing its pressure or vapour content. A given volume of air containing much water vapour has a higher dew point than the same volume of drier air; thus the dew point gives an indication of the humidity. In meteorology the dew point is applied, for example, in predicting the height of the base of certain types of clouds. A higher dew point means there will be more moisture in the air.
Incorrect
Solution: d)
Dew point, the temperature at which the atmosphere is saturated with water vapour, when it is cooled without changing its pressure or vapour content. A given volume of air containing much water vapour has a higher dew point than the same volume of drier air; thus the dew point gives an indication of the humidity. In meteorology the dew point is applied, for example, in predicting the height of the base of certain types of clouds. A higher dew point means there will be more moisture in the air.
