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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
Primary coil
The input coil of a transformer, connected to the alternating supply.
Primary coil
The input coil of a transformer, connected to the incoming electrical supply.
Primary commodity
A basic agricultural product or raw material that is traded, such as tobacco or copper.
Primary consumer
An animal that feeds on producers.
Primary consumer
A herbivore that eats producers and occupies trophic level 2.
Primary consumer
A consumer that eats a producer.
Primary data
Information collected first-hand by the person or group carrying out an investigation.
Primary data
Data collected directly by the person carrying out the investigation, such as measurements they take or answers to their own questionnaire.
Primary data
Data collected first-hand for the investigation being carried out.
Primary data
First-hand information collected for the investigation, such as interview answers, observations, test results or measurements.
Primary data
Data collected first-hand by a researcher for their investigation.
Primary data
New information collected first-hand by a researcher for their own research aim.
Primary economic activity
An activity that obtains raw materials directly from the natural environment, such as farming, forestry, fishing or mining.
Primary education
The first main stage of formal schooling, where children develop foundations such as reading, writing and numeracy.
Primary effect
A direct consequence of a hazard, such as buildings being destroyed by strong winds.
Primary employment
Work that obtains raw materials from the natural environment, such as farming, forestry and mining.
Primary energy
Energy supplied by natural resources before conversion into forms such as electricity. Total primary energy use includes resources used for transport and heating, not just electricity generation.
Primary energy consumption
Energy consumption measured before losses during conversion and transformation, such as fuel being converted into electricity.
Primary immune response
The specific immune response when an antigen is encountered for the first time.
Primary impact
Damage or harm caused directly by a hazard, such as wind destroying a building.
Primary key
A field whose value uniquely identifies each record in a table.
Primary potential difference
The potential difference across a transformer coil connected to the input supply.
Primary poverty
Poverty in which a household’s total income is insufficient to afford basic necessities, even if it spends its money as carefully as possible.
Primary precept
A fundamental principle in Aquinas' Natural Law from which more specific moral rules are derived.
Primary processing
The preparation of raw food materials to make them edible or suitable for further processing, including harvesting, cleaning, milling and treating milk.
Primary product
A product obtained directly from farming, fishing, forestry or mining, rather than through manufacturing.
Primary production
Production of metal from ore rather than by remelting existing metal.
Primary research
Collecting new, first-hand information specifically for the business’s research needs; also called field research.
Primary research
Research collected first-hand for a particular investigation, such as observations, interviews, measurements or product tests.
Primary research
Information collected first-hand for an investigation, for example through a survey, interview or observation.
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