# Atmospheric pressure/Related Articles

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*See also changes related to Atmospheric pressure, or pages that link to Atmospheric pressure or to this page or whose text contains "Atmospheric pressure".*

## Parent topics

- Physics [r]: The study of forces and energies in space and time.
^{[e]} - Earth science [r]: The study of the components and processes of the planet Earth.
^{[e]} - Engineering [r]: The profession in which a knowledge of the mathematical and natural sciences gained by study, experience and practice is applied with judgment to develop ways to economically use the materials and forces of nature for the benefit of mankind.
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## Subtopics

- Atmospheric science [r]: The umbrella term for the study of the Earth's atmosphere.
^{[e]} - Meteorology [r]: The interdisciplinary scientific study of the processes and phenomena of the atmosphere, including weather studies and forecasting
^{[e]} - Chemical engineering [r]: The field of engineering that deals with industrial and natural processes involving the chemical, physical or biological transformation of matter or energy into forms useful for mankind, economically and safely without compromising the environment
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- Atmosphere (unit) [r]: A unit of pressure measurement (symbol: atm) defined as 101,325 pascal.
^{[e]} - Atmospheric lapse rate [r]: Refers to the change of an atmospheric variable with a change of altitude, the variable being temperature unless specified otherwise (such as pressure, density or humidity).
^{[e]} - Bar (unit) [r]: A unit of pressure measurement (symbol: bar) defined as 100,000 Pascals.
^{[e]} - Barometric formula [r]: Formula that gives the atmospheric pressure as a function of height above the surface of a planet.
^{[e]} - Earth's atmosphere [r]: An envelope of gas that surrounds the Earth and extends from the Earth's surface out thousands of kilometres, becoming increasingly thinner (less dense) with distance but always held in place by Earth's gravitational pull.
^{[e]} - International System of Units [r]: Metric unit system based on the metre, kilogram, second, ampere, kelvin, mole and candela.
^{[e]} - Pascal (unit) [r]: The SI unit of pressure; the force of one newton acting uniformly over an area of one square metre.
^{[e]} - Pressure [r]: A ratio equal to the force applied perpendicular to the surface of the area divided by that area (force/area).
^{[e]} - Reference conditions of gas temperature and pressure [r]: The temperature and pressure conditions that define the density of a gas and serve to document a stated gas volume.
^{[e]} - Thermodynamics [r]: The statistical description of the properties of molecular systems
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