The force of gravity (the mass of the Earth) pulls the thin layer of gasses surrounding the planet (the atmosphere) and the result is that the gas layer has the greatest density near the surface of the planet.
YES!
It occurs in the troposhere, the narrowest layer of the atmosphere and it is where all life occurs
Nitrogen and Oxygen.
troposhere
Density of air decreases on increasing height, hence we categorize the atmosphere into different layers from Troposhere to Ionosphere at particular kilometers respectively.
Thre are no "layers" in the atmospher, it is a gradient from the surface on up. The lowest area, the troposhere, is the densest. However the bottoms of mine shafts would have even denser air and the most air molecules per unit volume.
troposhere
YES!
It goes troposhere then stratosphere then mesoshere then thermosphere
As you get higher the air is thinning not expanding.
the sun
Troposphere is found nearest to earth's surface. It contains bad ozone.
It goes troposhere then stratosphere then mesoshere then thermosphere
we live in the troposhere.
Yes, it is bad ozone. It acts as a polluntant.
The weather sphere is most commonly known as the troposhere.
i don't think i fully understand the question..do you mean where is most of the air in the atmosphere? if that's what you meant, most of the air is in the troposphere which is the layer of the atmosphere closest to the earth.