Why is the 75 percent atmospheric mass found in the troposphere?
2.1 Troposphere Gravity, combined with the compressibility of air, causes the density of an atmosphere to fall off exponentially with height, such that Earth’s troposphere contains 80\% of the mass and most of the water vapor in the atmosphere, and consequently most of the clouds and stormy weather.
In what layer is 75\% of the air in the atmosphere?
the troposphere
The majority of the mass of the entire atmosphere is contained in the troposphere—between approximately 75 and 80 percent. Most of the water vapor in the atmosphere, along with dust and ash particles, are found in the troposphere—explaining why most of Earth’s clouds are located in this layer.
Why do you think the troposphere contain over half of all the air in the atmosphere?
The Troposphere contains about half of all the air in the entire atmosphere. Because it i at the bottom, air pressure, or the weight of the air, is greatest in this layer. As altitude increases, air temperature and air pressure decreases.
Does the troposphere hold 75\% of all the gas molecules in the atmosphere?
The troposphere contains 75 percent of atmosphere’s mass- on an average day the weight of the molecules in the air is14. Water vapor plays a major role in regulating air temperature because it absorbs solar energy and thermal radiation from the planet’s surface.
Why is the troposphere the most important layer of the atmosphere?
Importance of troposphere to life on earth The study of the troposphere is very important because we breathe the air in this layer of air. Tropospheric processes, such as the water or hydrologic cycle (the formation of clouds and rain) and the greenhouse effect, have a great influence on meteorology and the climate.
Why can’t air from the troposphere and the stratosphere mix freely?
At the top of the troposphere is a thin layer in which the temperature does not change with height. This means that the cooler, denser air of the troposphere is trapped beneath the warmer, less dense air of the stratosphere. Air from the troposphere and stratosphere rarely mix.
Why is the troposphere considered as the most important layer of the atmosphere?
The study of the troposphere is very important because we breathe the air in this layer of air. Tropospheric processes, such as the water or hydrologic cycle (the formation of clouds and rain) and the greenhouse effect, have a great influence on meteorology and the climate.
Why is the troposphere the densest layer of the atmosphere?
Properties of the Troposphere The troposphere is the shortest layer of the atmosphere. It rises to only about 12 kilometers (7 miles) above the surface. Even so, this layer holds 75\% of all the gas molecules in the atmosphere. That’s because the air is densest in this layer.
What happens to air as it rises in the troposphere?
As one rises through the troposphere the temperature decreases. Air pressure and the density of the air also decrease with altitude. The troposphere is heated from below; sunlight warms the ground or ocean, which in turn radiates the heat into the air immediately above it.
How does the composition of the troposphere change with a change in altitude?
The concentration of water vapor decreases with an increase in altitude. The average concentration of water vapor for the troposphere is 0.46\%, while the average concentration for the stratosphere is 0.0005\%.
What happens to air as it rises in the troposphere quizlet?
How does atmospheric pressure change within the troposphere? It decreases with increasing altitude.
Why is troposphere the most important of all layers of the atmosphere Class 11?
It is most important layer of the atmosphere because: Thickness of the troposphere is greatest at the equator because heat is transported to great heights by strong convectional currents. This layer contains dust particles and water vapour. All changes in climate and weather take place in this layer.
What percentage of the atmosphere’s mass is in the troposphere?
The troposphere contains 75 percent of atmosphere’s mass- on an average day the weight of the molecules in the air is14.7 lb..(sq. in.)- and most of the atmosphere’s water vapor.
What is the role of water vapor in the troposphere?
Water vapor plays a major role in regulating air temperature because it absorbs solar energy and thermal radiation from the planet’s surface. The troposphere contains 99\% of the water vapor in the atmosphere.
Why does troposphere decrease rapidly with altitude?
troposphere decrease rapidly with altitude. Water vapor plays a major role in regulating air temperature because it absorbs solar energy and thermal radiation from the planet’s surface. The troposphere contains 99\% of the water vapor in the atmosphere.
Which layer of the atmosphere is responsible for weather?
The troposphere is the lowest layer of Earth’s atmosphere and site of all weather on Earth. The troposphere is bonded on the top by a layer of air called the tropopause, which separates the troposphere from the stratosphere, and on bottom by the surface of the Earth.