Product Center
Home » scientific definition of gas
  • gas - Dictionary Definition : Vocabulary.com

    Matter can be found in solid, liquid, or gas form. The air you breathe in and the carbon dioxide you breathe out, are both examples of gas.

  • State of Matter Definition - Chemistry Glossary

    Jul 03, 2019 · Gas: A gas lacks either a defined shape or volume. Gas particles are widely separated. Gas particles are widely separated. Examples of gases include air and the helium in a balloon.

  • Definition and Examples of Gas in Chemistry

    May 04, 2019 · A gas is defined as a state of matter consisting of particles that have neither a defined volume nor defined shape. It is one of the four fundamental states of matter, along with solids, liquids, and plasma. Under ordinary conditions, the gas state is between the liquid and plasma states.

  • Gas Meaning | Best 52 Definitions of Gas

    Gas is defined as an air-like substance that expands to fill the space it is in. It also refers to a substance used as fuel. An example of gas is helium. An example of …

  • Greenhouse gas | Definition of Greenhouse gas at ...

    Any of the atmospheric gases that contribute to the greenhouse effect by absorbing infrared radiation produced by solar warming of the Earth's surface. They include carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and water vapor.

  • Gas | Definition of Gas at Dictionary.com

    noun, plural gas·es or gas·ses. Physics. a substance possessing perfect molecular mobility and the property of indefinite expansion, as opposed to a solid or liquid. any such fluid or mixture of fluids.

  • Gas - definition of gas by The Free Dictionary

    gas (găs) n. pl. gas·es or gas·ses 1. a. The state of matter distinguished from the solid and liquid states by relatively low density and viscosity, relatively great expansion and contraction with changes in pressure and temperature, the ability to diffuse readily, and the spontaneous tendency to become distributed uniformly throughout any container ...

  • Kids Science Facts - Gases

    Science Facts Science Facts, Questions & Answers Space Outside experiments Glossary Fun Science Puzzles, Quizzes and Word Searches : Kids Matter facts and information - Gas ... All materials exist as a solid, liquid or gas.

  • What is gas? - Definition from WhatIs.com

    A gas is a sample of matter that conforms to the shape of a container in which it is held and acquires a uniform density inside the container, even in the presence of gravity and regardless of the amount of substance in the container. If not confined to a container, gaseous matter, also known as vapor, will disperse into space.The term gas is also used in reference to the state, or condition ...

  • Gas Meaning | Best 52 Definitions of Gas

    What does gas mean? Gas is defined as an air-like substance that expands to fill the space it is in. It also refers to a substance used as f...

  • Aerosol | physics | Britannica

    Aerosol, a system of liquid or solid particles uniformly distributed in a finely divided state through a gas, usually air. Aerosol particles, such as dust, play an important role in the precipitation process, providing the nuclei upon which condensation and freezing take place. They affect climate

  • Noble Gas | Definition of Noble Gas by Merriam-Webster

    Feb 12, 2021 · Noble gas definition is - any of a group of rare gases that include helium, neon, argon, krypton, xenon, and usually radon and that exhibit great stability and extremely low reaction rates —called also inert gas.

  • Examples of Gas - Your Dictionary

    A gas is one of the three states of matter, the other two being liquid and solid.Many elements exist as gases at standard temperature and pressure, while many other elements and compounds can become gases under certain circumstances.

  • Natural Gas | Definition of Natural Gas by Merriam-Webster

    Jun 16, 2021 · Natural gas definition is - gas issuing from the earth's crust through natural openings or bored wells; especially : a combustible mixture of methane and other hydrocarbons used chiefly as a fuel and raw material. How to use natural gas in a sentence.

  • Industrial gas - Wikipedia

    These demarcations are based on perceived boundaries of these industries (although in practice there is some overlap), and an exact scientific definition is difficult. To illustrate "overlap" between industries: Manufactured fuel gas (such as town gas) would historically have been considered an industrial gas.

  • Properties of Matter: Gases | Live Science

    Jan 08, 2016 · Gas is a state of matter that has no fixed shape and no fixed volume. Gases have lower density than other states of matter, such as solids and liquids.There is a great deal of empty space between ...

  • Definition of Gas - Chemistry Dictionary

    Definition of Gas. Gases are one of the four common states of matter - the others are solids, liquids, gases, and plasmas. In general, but not in all specific cases, as the temperature increases and pressure decreases substances pass through the four different states.

  • Gas Chromatography | Definition of Gas Chromatography by ...

    Jun 07, 2021 · Gas chromatography definition is - chromatography in which the sample mixture is vaporized and injected into a stream of carrier gas (such as nitrogen or helium) moving through a column containing a stationary phase composed of a liquid or particulate solid and is separated into its component compounds according to their affinity for the stationary phase.

  • greenhouse gas | Definition, Emissions, & Greenhouse ...

    Greenhouse gas, any gas capable of absorbing infrared radiation (net heat energy) emitted from Earth’s surface and reradiating it back to Earth’s surface, thus contributing to the phenomenon known as the greenhouse effect. Carbon dioxide, methane, and water vapor are the most important greenhouse gases.

  • Medical Definition of Gas exchange - MedicineNet

    Mar 29, 2021 · home / medterms medical dictionary a-z list / gas exchange definition Medical Editor: Melissa Conrad Stöppler, MD Gas exchange: The primary function of the lungs involving the transfer of oxygen from inhaled air into the blood and the transfer of …

  • Liquid | Definition of Liquid at Dictionary.com

    Liquid definition, composed of molecules that move freely among themselves but do not tend to separate like those of gases; neither gaseous nor solid. See more.

  • How Galaxies Work | HowStuffWorks - Science

    Feb 07, 2008 · A galaxy is a large system of stars, gas (mostly hydrogen), dust and dark matter that orbits a common center and is bound together by gravity -- they've been describe­d as "island universes." Galaxies come in many sizes and shapes. We know that they're very old and formed early in the evolution of the universe.

  • Entropy - Wikipedia

    Entropy is a scientific concept, as well as a measurable physical property that is most commonly associated with a state of disorder, randomness, or uncertainty. The term and the concept are used in diverse fields, from classical thermodynamics, where it was first recognized, to the microscopic description of nature in statistical physics, and to the principles of information theory.

  • pressure | Definition, Measurement, & Types | Britannica

    The standard scientific notation for pressure is expressed in pascals or megapascals (1… gas: Pressure Newton’s second law of motion can be stated in not-so-familiar form as impulse equals change in momentum, where impulse is force multiplied by the time during which it acts.

  • Gas Lesson for Kids: Definition & Facts | Study.com

    Oct 31, 2020 · What Is Gas? Gas is one of the three states, or forms, of matter and is invisible. Matter is anything that takes up space. Basically, gas is one of …

  • Gas giant | Definition of Gas giant at Dictionary.com

    Gas giant definition, a giant planet composed mostly of hydrogen and helium: the two gas giants in our solar system, Jupiter and Saturn, are sometimes called failed stars because their composition is similar to that of stars, but this is largely considered misleading, as gas giants, unlike brown dwarfs, do not form as stars do. See more.

  • Kids science: Solid, Liquid, Gas

    Science >> Chemistry for Kids ... Matter usually exists in one of three states or phases: solid, liquid, or gas. The chair you are sitting on is a solid, the water you drink is liquid, and the air you breathe is a gas. Changing State The atoms and molecules don't change, but the way they move about does. Water, for example, is always made up of ...

  • Natural gas - Wikipedia

    Natural gas (also called fossil gas; sometimes just gas) is a naturally occurring hydrocarbon gas mixture consisting primarily of methane, but commonly including varying amounts of other higher alkanes, and sometimes a small percentage of carbon dioxide, nitrogen, hydrogen sulfide, or helium. It is formed when layers of decomposing plant and animal matter are exposed to intense heat and ...