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Browse key terms and definitions across all GCSE subjects. Search by keyword or filter by subject and exam board.
23,110 key terms
Aerobic exercise
Exercise in which energy is released using oxygen, allowing activity to be sustained over a prolonged period.
Aerobic fitness
The ability to sustain exercise using oxygen to release energy, also called cardiovascular endurance.
Aerobic respiration
Respiration that uses oxygen and completely oxidises glucose.
Aerobic respiration
Respiration that uses oxygen to release energy from glucose.
Aerobic respiration
Cellular respiration that uses oxygen to break down glucose completely, producing carbon dioxide and water.
Aerobic respiration
The release of energy using oxygen, which supports sustained exercise.
Aerobic target zone
The heart-rate range from 60% to 80% of estimated maximum heart rate, used to guide training for aerobic endurance.
Aerobic training
Training that mainly uses energy released aerobically, with oxygen, typically through sustained activity.
Aerobic training zone
A target heart-rate range of 60–80% of maximum heart rate, used to develop aerobic fitness.
Aeroponics
Growing plants without soil, with their roots suspended in air and sprayed with nutrient-rich mist.
Aerosol
A small solid particle or liquid droplet suspended in the atmosphere. Some aerosols reflect sunlight and have a cooling effect.
Aerosols
Tiny solid particles or liquid droplets suspended in the atmosphere.
Aesthetic
The distinctive artistic qualities of a film, created through the combination of its visual and sound elements.
Aesthetic factor
A characteristic affecting how a material or product looks or feels, such as its form, colour or texture.
Aesthetic property
A characteristic affecting a product’s appearance or sensory appeal, such as colour, gloss or texture.
Aesthetic quality
The quality of a movement that makes it visually attractive or pleasing to watch.
Aesthetic quality
The visual qualities that make food attractive, including its colour, arrangement and neatness.
Aesthetic quality
The visual and aural qualities of a film, created through the artistic combination of cinematography, mise-en-scène, editing and sound.
Aesthetics
The appearance and sensory appeal of a product, including its shape, colour and texture.
Aesthetics
The appearance and sensory qualities of a design, such as its colour, shape, texture and feel.
Aesthetics
The artistic qualities of a film: how elements of film form combine to create its look, mood and style.
Aethling
An Anglo-Saxon title for a prince of the royal family who could be considered eligible for kingship.
Aetiological myth
A story that explains the origin of a feature of the world, a name, an object or a practice.
Aetiology
A story or explanation of the origin of a custom, religious practice or physical feature.
Affability
Friendly, approachable behaviour. Mr Collins uses this word to praise Lady Catherine, although her conduct towards Elizabeth is intrusive and commanding.
Affected individual
A person who displays the characteristic or disorder being followed in a pedigree.
Affirmative action
Measures that deliberately improve opportunities for groups disadvantaged by discrimination, for example by encouraging employers to recruit Black applicants.
Affluence
A relatively high level of material prosperity, allowing people to enjoy more goods, services and comforts.
Affluence
Wealth that gives people greater ability to buy goods and services.
Affluence
Having substantial money and material possessions.
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