Answer
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Hint: The lowest portion of the atmosphere is the troposphere, a layer where temperature generally decreases with height. This layer contains most of Earth’s clouds and is the location where weather primarily occurs.
Complete answer:
The troposphere is the lowest layer of Earth's atmosphere, and is also where nearly all weather conditions take place. It contains $75\% $ of the atmosphere's mass and $99\% $ of the total mass of water vapor and aerosols. The average height of the troposphere is $18Km$ in the tropics, $17Km$ in the middle latitudes, and $6Km$ in the polar regions in winter. The total average height of the troposphere is $13Km$.
The lowest part of the troposphere, where friction with the Earth's surface influences airflow, is the planetary boundary layer. This layer is typically a few hundred meters to $2Km$ deep depending on the landform and time of day.
The temperature of the troposphere generally decreases as altitude increases. The rate at which the temperature decreases, $ - \dfrac{{dT}}{{dz}}$, is called the environmental lapse rate. The$ELR$ is nothing more than the difference in temperature between the surface and the tropopause divided by the height. The reason for this temperature difference is that the ground absorbs most of the sun's energy, which then heats the lower levels of the atmosphere with which it is in contact. Meanwhile, the radiation of heat at the top of the atmosphere results in the cooling of that part of the atmosphere.
So, the correct answer is $C)$ Troposphere .
Note:
Measuring the temperature change with height through the troposphere and the stratosphere identifies the location of the tropopause. In the troposphere, temperature decreases with altitude. In the stratosphere, however, the temperature remains constant for a while and then increases with altitude.
Complete answer:
The troposphere is the lowest layer of Earth's atmosphere, and is also where nearly all weather conditions take place. It contains $75\% $ of the atmosphere's mass and $99\% $ of the total mass of water vapor and aerosols. The average height of the troposphere is $18Km$ in the tropics, $17Km$ in the middle latitudes, and $6Km$ in the polar regions in winter. The total average height of the troposphere is $13Km$.
The lowest part of the troposphere, where friction with the Earth's surface influences airflow, is the planetary boundary layer. This layer is typically a few hundred meters to $2Km$ deep depending on the landform and time of day.
The temperature of the troposphere generally decreases as altitude increases. The rate at which the temperature decreases, $ - \dfrac{{dT}}{{dz}}$, is called the environmental lapse rate. The$ELR$ is nothing more than the difference in temperature between the surface and the tropopause divided by the height. The reason for this temperature difference is that the ground absorbs most of the sun's energy, which then heats the lower levels of the atmosphere with which it is in contact. Meanwhile, the radiation of heat at the top of the atmosphere results in the cooling of that part of the atmosphere.
So, the correct answer is $C)$ Troposphere .
Note:
Measuring the temperature change with height through the troposphere and the stratosphere identifies the location of the tropopause. In the troposphere, temperature decreases with altitude. In the stratosphere, however, the temperature remains constant for a while and then increases with altitude.
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