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With reference to the structure of the atmosphere, consider the following statements:
- The column of atmosphere is divided into different layers depending upon the distance above sea level.
- Density of the air decreases with increasing altitude.
- Almost all changes in climate and weather take place in troposphere.
Which of the statements given above is/are correct?
- a)3 only
- b)2 and 3 only
- c)1 and 2 only
- d)1, 2 and 3
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
With reference to the structure of the atmosphere, consider the follow...
- The atmosphere consists of different layers with varying density and temperature. The column of atmosphere is divided into five different layers depending upon the temperature condition. Hence statement 1 is not correct.
- The main source of heat is heat transfer from the surface directly to the air. As one moves farther from the source of the heat, the temperature cools, and this region of decreasing temperature gradient, called the troposphere.
- Weather is confined to this lowest layer of the atmosphere. This layer contains dust particles and water vapour.
- Almost all changes in climate and weather take place in this layer. Hence statement 3 is correct. The temperature in this layer decreases at the rate of 1°C for every 165m of height. This is the most important layer for all biological activity
- The other layers are - stratosphere, mesosphere, thermosphere and exosphere
- Density is highest near the surface of the earth and decreases with increasing altitude
- There are two reasons: at higher altitudes, there is less air pushing down from above, andgravity is weaker farther from Earth's center. Hence statement 2 is correct.
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With reference to the structure of the atmosphere, consider the follow...
The correct answer is option B, which states that statements 2 and 3 are correct. Let's analyze each statement in detail:
1. The column of atmosphere is divided into different layers depending upon the distance above sea level.
This statement is incorrect. The column of the atmosphere is indeed divided into different layers, but these divisions are based on temperature changes rather than distance above sea level. There are five main layers of the atmosphere: troposphere, stratosphere, mesosphere, thermosphere, and exosphere. The boundaries between these layers are defined by changes in temperature and other physical properties, not by distance from the sea level.
2. Density of the air decreases with increasing altitude.
This statement is correct. As we move higher in the atmosphere, the density of air decreases. This is because the weight of the air above decreases with increasing altitude, resulting in lower pressure. As a result, the molecules in the air are more spread out, leading to a decrease in density.
3. Almost all changes in climate and weather take place in the troposphere.
This statement is also correct. The troposphere is the lowest layer of the atmosphere, extending from the Earth's surface up to an altitude of about 8-15 kilometers. It is where most weather phenomena occur, such as clouds, rain, snow, and thunderstorms. The troposphere also plays a crucial role in the Earth's climate system, as it is responsible for the majority of the greenhouse effect and the mixing of air masses.
In summary, statement 1 is incorrect, while statements 2 and 3 are correct. The density of air decreases with increasing altitude, and almost all changes in climate and weather occur in the troposphere.
1. The column of atmosphere is divided into different layers depending upon the distance above sea level.
This statement is incorrect. The column of the atmosphere is indeed divided into different layers, but these divisions are based on temperature changes rather than distance above sea level. There are five main layers of the atmosphere: troposphere, stratosphere, mesosphere, thermosphere, and exosphere. The boundaries between these layers are defined by changes in temperature and other physical properties, not by distance from the sea level.
2. Density of the air decreases with increasing altitude.
This statement is correct. As we move higher in the atmosphere, the density of air decreases. This is because the weight of the air above decreases with increasing altitude, resulting in lower pressure. As a result, the molecules in the air are more spread out, leading to a decrease in density.
3. Almost all changes in climate and weather take place in the troposphere.
This statement is also correct. The troposphere is the lowest layer of the atmosphere, extending from the Earth's surface up to an altitude of about 8-15 kilometers. It is where most weather phenomena occur, such as clouds, rain, snow, and thunderstorms. The troposphere also plays a crucial role in the Earth's climate system, as it is responsible for the majority of the greenhouse effect and the mixing of air masses.
In summary, statement 1 is incorrect, while statements 2 and 3 are correct. The density of air decreases with increasing altitude, and almost all changes in climate and weather occur in the troposphere.
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With reference to the structure of the atmosphere, consider the following statements: The column of atmosphere is divided into different layers depending upon the distance above sea level. Density of the air decreases with increasing altitude. Almost all changes in climate and weather take place in troposphere.Which of the statements given above is/are correct?a)3 onlyb)2 and 3 onlyc)1 and 2 onlyd)1, 2 and 3Correct answer is option 'B'. Can you explain this answer?
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