Because the atmosphere on the moon is negligible.
No atmosphere = No atmospheric pressure
The moon has no atmosphere, so its pressure is zero.
Sucking through a straw relies on atmospheric pressure to push the liquid up. In the airless environment of the moon, there is no atmospheric pressure to assist in the suction action, making it impossible to drink through a straw.
The atmospheric pressure on the moon is far less than 1.10-11 torr or mbar.Earth: 2.5x1019 mol/cm3 (STP, 1 atm) Moon: ≈104 mol/cm3 day and ≈ 2x105 mol/cm3 night or approx. 10-14 of that found on Earth i.e. 10-14 torr.Carrier, W.D., Olhoeft, G.R., and Mendell W. (1991). "Physical properties of the lunar surface." The Lunar Sourcebook. Heiken, V. and French, eds., Cambridge University Press, New York, Vol. 1, pp. 284 - 293.
Atmospheric pressure
There is no atomosphere or atmospheric pressure. Without atomspheric pressure the astronauts blood would boil.
The atmospheric pressure on the moon is nearly zero (effectively vacuum).
Standard conditions, or standard temperature and pressure (STP) is the atmospheric pressure at sea level with temperature at zero degrees Celsius (273.15 Kelvin).
Standard conditions, or standard temperature and pressure (STP) is the atmospheric pressure at sea level with temperature at zero degrees Celsius (273.15 Kelvin).
Standard conditions, or standard temperature and pressure (STP) is the atmospheric pressure at sea level with temperature at zero degrees Celsius (273.15 Kelvin).
The space with a pressure of zero pascals is called a vacuum. In a vacuum, there is an absence of gases and atmospheric pressure.
The term you're looking for is "standard atmospheric pressure," which is defined as the atmospheric pressure at sea level at zero degrees Celsius. It is commonly used as a reference point for pressure measurements in meteorology and other fields.
The moon has no atmosphere, so its pressure is zero.
Less.
pressure is usually measured relative to atmospheric this is called gauge pressure. if you compare against absolute zero pressure (vacuum) this is called absolute pressure.
If atmospheric pressure decreases to zero, the atmosphere would essentially disappear. This would lead to a lack of air to breathe, extreme temperature fluctuations, and the inability for liquid water to exist on the surface due to the lack of pressure. Humans would not survive in such conditions.
Almost zero. Pluto has very little gravity and cannot support much of an environment. In its summer, it can get up to 0.3 Pascals of atmospheric pressure, about 338,000 times less pressure than on Earth.
Sucking through a straw relies on atmospheric pressure to push the liquid up. In the airless environment of the moon, there is no atmospheric pressure to assist in the suction action, making it impossible to drink through a straw.