Air density (mass per unit volume) increases as altitude decreases. Gravity pulls atmospheric particles around the Earth, but pressure is the greatest at the bottom surface of the Earth where millions of particles are stacked up in a column till the edge of the atmosphere. Towards the outer edge of the atmosphere, the air particles are being weighed down on less and the pressure decreases with higher altitude.
-- The density of a closed jar full of air doesn't change, no matter how high you take it.
-- The density of the open air in the atmosphere that's all around you decreases steadily
as your altitude increases.
Density of air goes down as the distance from the earth goes up. This is why you need oxygen even at a relatively short distance from earth on a commercial airplanes (if a leak occurs). Airplanes are pressurized so you don't realize the reduced oxygen and the reduced pressure due to the air density being lower.
At a point about 350 miles from earth, you're considered to be space. We think of space as a vaccum so essentially no air. Air density has fallen to 0.
Air pressure measures the amount air pressing down from above. The pressure also forces the air molecules to press together. That is the density of the air. As altitude increases (you go higher), the amount of air above decreases, so the air pressure decreases and the density also decreases.
The density of air decreases with increasing altitude.
The atmosphere becomes thinner
The density decreases....
It decreases.
the density of sea increases with depth
The volume of a substance increases when heated, causing a decrease in density.
Density is mass per unit volume of a substance. The Mass and volume of water is in the ratio of 1:1 .There fore the density of water is 1. With rise and decrease of temperature the volume increases or decreases to change the water density.
When the "thing" is expanded, the density does change because the matter is expanded and given more room, this makes it a lesser density.
Density = mass/volume. If you increase the volume but the mass remains the same the denominator will become larger while the numerator reamins the same. This will cause the fraction to become smaller and thus the density will decrease. In short the density will decrease!
-- The density of a closed jar full of air doesn't change, no matter how high you take it. -- The density of the open air in the atmosphere that's all around you decreases steadily as your altitude increases.
As the altitude increases, the temperature in the troposphere will decrease. The troposphere is the lowest portion of planet's atmosphere.
The density of air decreases as altitude increases.
Temperature decreases as altitude increases.
The density of air decreases when the altitude rises.
2 degrees per 1000 ft is general answer
The temperature decreases
As altitude increases so air pressure reduces, until the limit of our atmosphere is reached. After which the vacuum of space is entered.
By farting
When mass increases and volume stays constant, the density increases. When volume increases and mass stays constant the density decreases. When they both change, then the density will depend on the rate of change of mass and the rate of change of volume.
The rate of change of air pressure as a function of increasing altitude decreases with increasing altitude.
density changes as the altitude changes.