Because there is gravity, that pulls stuff to the core.
A human is under an average pressure of about 14.7 pounds per square inch (psi) at sea level on Earth due to the weight of the atmosphere pressing down on them. This pressure decreases at higher altitudes and increases underwater.
The troposphere is the layer of the earth's atmosphere with the highest air pressure.
If Earth's atmosphere contained twice as many molecules as it does today, the atmospheric pressure would also double. This is because pressure is directly related to the number of gas molecules in the atmosphere.
The atmospheric pressure on Venus is about 92 times greater than Earth's atmospheric pressure, equivalent to being about 900 meters underwater on Earth. The high pressure on Venus is due to the thick layer of carbon dioxide and other gases in its atmosphere.
Saturn is so much larger than Earth that it's atmosphere is under enough pressure to create a higher surface temperature.
Much thicker, almost certainly at least as thick as the diameter of the earth. Its pressure is much higher as well due to the high mass of the planet and its atmosphere and the strong gravity.
Yes, it has an atmosphere so it has air pressure.
The troposphere is the layer of the earth's atmosphere with the highest air pressure.
No, Earth's atmosphere is not as thick as Venus'. Venus has an atmosphere that is composed mainly of carbon dioxide, with a pressure about 92 times greater than Earth's atmosphere. This makes Venus' atmosphere much thicker and denser than Earth's.
Venusian atmospheric pressure is much greater than that of earth--IIRC about 90 bar of pressure vs only 1 for earth. (but on both density and pressure decline with increasing altitude.) 2. The venusian atmosphere is largely formed of CO, unlike that of earth. (but both have this gas) 3. The venusian atmosphere is much hotter than ours. (but both are warmed by the sun.) 4. The essential difference--the venusian atmosphere is not under biological control like ours is.
Barometric pressure,humidity,and temperature.
It would need around 4x1018 kg of air to raise Mars' atmosphere to earth's atmospheric pressure. The answer is formulated under general pressure-depth relation assuming ratio of atmosphere depth is very small to the planet's diameter. P = m.g/A P = pressure = 101300 Pascal at earth's sea level m = mass of air [=] kg g = Mars gravity = 3.7 m/s2 A = surface area of Mars [=] m2