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Showing 91–120 of 1709 reference entries

ChemistryReaction rates and empirical rate laws

Reaction rate measures change over time; a rate law describes its dependence under specified conditions.

MethodChemistryCatalysis and equilibrium

A catalyst changes the reaction pathway and rate, while preserving the equilibrium constant for the same reaction.

ModelBiologyCells as units of life

Cell theory describes the organization and reproduction of cellular life.

ModelBiologyDNA and sequence information

DNA's base sequence stores biological information.

DefinitionBiologyGene expression

Gene expression produces functional RNA or protein from gene information.

DefinitionBiologyDNA replication

Complementary base pairing allows DNA strands to serve as copying templates.

ModelBiologyCell cycle, mitosis and cytokinesis

DNA duplication, nuclear division and cytoplasmic division are distinct events in a typical mitotic cycle.

ModelBiologyMeiosis and chromosome segregation

Typical diploid meiosis halves the number of chromosome sets through two divisions after one DNA replication.

ModelBiologyAlleles and Mendelian segregation

A diploid individual's paired alleles can segregate into gametes.

ModelBiologyBiological evolution

Evolution concerns inherited change across generations.

DefinitionBiologyNatural selection

Heritable variation can change through differences in reproductive contribution.

ModelBiologyGenetic drift

Chance can change allele frequencies independently of an adaptive advantage.

ModelBiologyCommon ancestry and branching lineages

Evolutionary relationships describe descent from shared ancestors.

ModelBiology · ChemistryMetabolism and chemical pathways

Metabolism comprises the regulated chemical reactions of living systems.

DefinitionBiologyOxygenic photosynthesis

Oxygenic photosynthesis couples light-energy capture to carbon fixation and releases oxygen from water.

ModelBiologyAerobic cellular respiration

Aerobic respiration couples nutrient oxidation to ATP production, using oxygen as the final electron acceptor.

ModelBiologyMembranes and transport

Selective membranes and transport proteins regulate movement between a cell and its surroundings.

ModelBiologyEcology and ecosystems

Ecology examines organisms' interactions with one another and their physical environment.

DefinitionBiologyHomeostasis and negative feedback

Feedback can maintain internal variables within functional ranges.

ModelEarth & cosmosRock cycle and geological transformation

Rock materials can change through multiple geological pathways.

ModelEarth & cosmosPlate tectonics

Moving lithospheric plates organize many large-scale geological processes.

ModelEarth & cosmosEarth's water cycle

Water moves among reservoirs above, on and below Earth's surface.

ModelEarth & cosmos · Biology · ChemistryEarth's carbon cycle

Carbon moves through biological, oceanic, atmospheric and geological reservoirs.

ModelEarth & cosmosPlanetary radiative energy balance

Earth's energy storage changes when incoming and outgoing energy differ.

ModelEarth & cosmosAtmospheric greenhouse effect

Infrared absorption and emission affect how Earth loses heat to space.

ModelEarth & cosmosWeather, climate and their time scales

Weather describes short-term conditions; climate describes their longer-term patterns.

DefinitionEarth & cosmosOrbits as gravitational motion

An orbiting body can remain in continuous gravitational free fall.

ModelEarth & cosmosStellar fusion and evolution

Main-sequence stars release energy by fusing hydrogen into helium.

ModelEarth & cosmosHot Big Bang and the cosmic microwave background

Expansion and relic radiation support an earlier hot, dense Universe.

ModelMathematics & logicFirst-order predicates and quantifiers

Quantifiers bind variables over a specified domain.

Definition
ModelSource checked

Atmospheric greenhouse effect

Earth & cosmos

Infrared absorption and emission affect how Earth loses heat to space.

Key knowledge

Greenhouse gases absorb and emit thermal infrared radiation. This affects outgoing heat loss and allows Earth's surface and lower atmosphere to be warmer than they would be without those gases under comparable solar input.

Conditions and scope

  • Absorption depends on wavelength; the atmosphere is not a completely closed barrier to radiation.
  • This mechanism is distinct from the circulation restriction in a glass greenhouse; a temperature prediction also requires feedbacks and boundary conditions.
Sources · 4

References

Sources retain their recorded scope. A source link alone does not establish verification of every statement.

  1. What is the greenhouse effect?NASAReference guidescience.nasa.govRead source
  2. The Greenhouse Effect — How Does the Greenhouse Effect Work?University Corporation for Atmospheric Research (UCAR), Center for Science EducationTeaching resourcescied.ucar.eduRead source
  3. Weather and climate tutorial: greenhouse gas effectUK Environmental Change NetworkReference guideecn.ac.ukRead source
  4. Radiative transfer in the atmosphereMet OfficeTextbook chaptermetoffice.gov.ukRead source

Evidence and review

NASA and UCAR's documented radiative mechanism; a blanket analogy is not treated as the physical explanation.

2026-10-10 · English absorption/emission and qualified warming scope checked against the NASA FAQ and UCAR mechanism; no numerical warming estimate is claimed.

Foundational review

2026-10-10 · Fresh primary-source inspection of the complete compact record, including every statement, equation, quantity and material condition, followed by independent AI editorial review. This check does not certify all linked lessons or every passage of every cited publication.

Sources from other places

Agreement within this scope

Atmospheric gases absorb radiation and emit thermal radiation.

The comparison concerns radiative physics, not a measured warming rate.

Related reference entries

Explore relationships within this area of study and its connections to other areas.

Showing 1–4 of 4 relationships

Scientific relationships · 4 / 4

The relationship type describes the connection. Its linked statements, sources and conditions define the scope.

  1. Related to
    Relationship sources · 2

    Linked statements

    • Carbon cycles among the atmosphere, organisms, soils, oceans and rocks. Biological processes such as photosynthesis, respiration and decomposition exchange carbon, while weathering, sediment formation and tectonic processes participate in slower geological transfers.
    • Greenhouse gases absorb and emit thermal infrared radiation. This affects outgoing heat loss and allows Earth's surface and lower atmosphere to be warmer than they would be without those gases under comparable solar input.

    Atmospheric carbon dioxide links carbon reservoirs with the greenhouse mechanism; not all carbon is atmospheric gas.

  2. Related to
    Relationship sources · 1

    Linked statements

    • Greenhouse gases absorb and emit thermal infrared radiation. This affects outgoing heat loss and allows Earth's surface and lower atmosphere to be warmer than they would be without those gases under comparable solar input.
    • At the top of the atmosphere, Earth's radiative balance compares incoming sunlight with reflected sunlight and outgoing thermal radiation. On a global average, sustained net energy input increases energy stored in the Earth system; radiative equilibrium requires balanced incoming and outgoing fluxes.

    Greenhouse absorption and emission are components of the radiative energy budget.

  3. Related to
    Relationship sources · 1

    Linked statements

    • Atmospheric mass, composition and opacity affect a planet's surface conditions. Venus demonstrates that a dense CO₂-rich atmosphere can strongly impede outgoing thermal radiation and maintain a high surface temperature. Convection redistributes heat within its thick lower atmosphere; distance from a star alone does not determine surface climate.

    Atmospheric infrared interactions connect climate across planets.

  4. Related to
    Relationship sources · 3

    Linked statements

    • Typical lower-atmosphere dry air is approximately 78% nitrogen and 21% oxygen by molecular fraction, with argon and other gases making up most of the remainder; water vapor and aerosols vary. In a representative vertical temperature profile, the troposphere cools upward, the stratosphere warms upward, the mesosphere cools upward and the thermosphere warms upward. Most weather occurs in the troposphere. Stratospheric ozone absorbs solar ultraviolet energy. The rarefied exosphere is a transition toward space, rather than a solid outer boundary.

    Major bulk gases, infrared-active gases and ultraviolet-absorbing stratospheric ozone describe different radiative roles.

Entry detailsPermanent link to this entry ↗
Record identity
earth-greenhouse-effect
Revision
core.1
Structured reference record
Essential core · first collection