Greenhouse Gases
Greenhouse Gases - Related Videos
02:54
Noble Gases
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2020
The elements in group 18 are noble gases (helium, neon, argon, krypton, xenon, and radon). They earned the name “noble” because they were assumed to be nonreactive since they have filled valence shells. In 1962, Dr. Neil Bartlett at the University of British Columbia proved this assumption to be false. These elements are present in the atmosphere in small amounts. Some natural gas contains 1–2% helium by mass. Helium is isolated from natural gas by liquefying the condensable components,...
02:26
Molecular Comparison of Gases, Liquids, and Solids
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2020
Particles in a solid are tightly packed together (fixed shape) and often arranged in a regular pattern; in a liquid, they are close together with no regular arrangement (no fixed shape); in a gas, they are far apart with no regular arrangement (no fixed shape). Particles in a solid vibrate about fixed positions (cannot flow) and do not generally move in relation to one another; in a liquid, they move past each other (can flow) but remain in essentially constant contact; in a gas, they move...
01:29
Perfect Gases and the First Law
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2026
A perfect gas obeys the equation of state pV = nRT. The internal energy of a perfect gas remains unaffected by volume alterations. Therefore, the internal energy of a perfect gas is solely dependent on temperature.Consider an ideal gas enclosed in a cylinder situated within a substantial constant-temperature bath. In an isothermal process, where the temperature remains constant, the change in internal energy equates to zero. Thus, according to the first law of thermodynamics, heat absorbed (q)...
03:03
Mixtures of Gases: Dalton's Law of Partial Pressures and Mole Fractions
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2020
Unless individual gases chemically react with each other, the individual gases in a mixture of gases do not affect each other’s pressure. Each gas in a mixture exerts the same pressure that it would exert if it were present alone in the container. The pressure exerted by each individual gas in a mixture is called its partial pressure. This means that in a mixture containing three different gases A, B, and C, if PA is the partial pressure of gas A; PB is the partial pressure of gas B; PC is the...
01:24
The Kinetic Model of Gases
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2026
The kinetic model of gases explains the properties of a perfect gas using three main assumptions: molecules move in ceaseless random motion, their size is negligible compared to the distances between them, and they do not interact except during perfectly elastic collisions. The total energy of a gas is the sum of the kinetic energies of all its constituent molecules. The pressure exerted by the gas arises from the continual bombardment of the container walls by billions of colliding molecules.
FAQs
After absorbing outgoing infrared radiation, greenhouse-gas molecules undergo changes in vibration and rotation. They then re-emit that energy in multiple directions, including toward Earth’s surface. This redistribution of energy helps regulate surface temperature and explains why changes in atmospheric concentrations can alter environmental conditions relevant to living organisms.
Higher atmospheric concentrations increase the amount of infrared energy that can be absorbed and re-emitted by gases such as carbon dioxide, methane, nitrous oxide, and water vapor. More energy is consequently redirected through the atmosphere, influencing Earth’s temperature and contributing to broader changes in climate patterns.
Water vapor is one of the atmospheric compounds that absorbs and re-emits infrared radiation, so it participates in regulating Earth’s temperature together with carbon dioxide, methane, and nitrous oxide. Considering these gases together gives biology a more complete basis for examining how atmospheric energy conditions affect life and ecosystems.
The greenhouse effect helps regulate Earth’s temperature and maintain conditions essential for life, but human activities can increase concentrations of greenhouse gases in the atmosphere. That increase strengthens the effect and alters climate patterns, creating a biological context in which organisms and ecosystems experience changing environmental conditions.
Biologists examine how greenhouse-gas-related climate changes correspond with shifts in species distributions, seasonal timing, ecosystem productivity, ocean conditions, and disease risks. These categories connect atmospheric processes with observable biological responses, allowing researchers to investigate how changing environmental conditions influence organisms, communities, and ecosystems.
Altered climate patterns associated with greenhouse gases can affect where species occur, when seasonal biological events take place, and how productive ecosystems are. They can also influence ocean conditions and disease risks. Together, these responses show that atmospheric change can affect distribution, timing, ecosystem function, and biological threats.
Greenhouse gases provide a central context for studying how organisms and ecosystems respond to changing climate conditions. Research can connect atmospheric changes with shifts in species distributions, seasonal timing, productivity, and disease risks, helping explain patterns of adaptation and changes in biodiversity across biological systems.
Their effects create a direct link between atmospheric energy regulation and biological conditions. Changes in greenhouse-gas concentrations can alter climate patterns, while biology examines the resulting consequences for species, ecosystems, ocean conditions, and disease risks. This connection makes greenhouse gases important for understanding climate change as a biological research problem.