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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
Annual ring
A ring of growth added to a tree trunk each year, visible in a cross-section through the trunk.
Annual temperature range
The difference between the highest and lowest mean monthly temperatures in a year.
Annuities
Annual payments, often delivered as money, goods or supplies, promised by the US government to Native American tribes.
Annuity
Payments or supplies promised to an Indigenous nation under an agreement with the US government, often in return for land.
Annulment
A formal declaration that a marriage was never legally valid.
Annulment
A Church ruling that a marriage was never valid, rather than the ending of a valid marriage.
Annunciation
The angel Gabriel’s announcement to Mary that she would conceive Jesus through the power of the Holy Spirit.
Anode
The positive electrode in electrolysis, where negative ions lose electrons.
Anode
The positive electrode during electrolysis, where negatively charged ions lose electrons.
Anode sludge
Solid impurities that collect beneath the anode during electrolytic purification of a metal.
Anodising
An electrochemical treatment that thickens the protective oxide layer on aluminium, improving its surface hardness and wear resistance.
Anoint
To apply oil or spices to someone’s body; in Mark 16:1, the women intend to care for Jesus’ body as part of burial customs.
Anointed monarch
A ruler whose coronation included a religious ceremony of anointing, reinforcing the belief that royal authority came from God.
Anointing
Applying oil to a person. In Mark 6:13, the Twelve anoint sick people with oil and heal them.
Anointing of the sick
The sacrament in which a seriously ill person is anointed with oil to receive spiritual strength, comfort and healing.
Anomalous result
A result that is noticeably different from the other repeated results.
Anomalous result
A result that does not fit the pattern of the other results and may have arisen from an experimental problem.
Anomalous result
A result that differs substantially from the pattern formed by the other results.
Anomalous result
A result that is noticeably different from the other results or the overall pattern.
Anomaly
A result that differs from the general pattern in a set of data.
Anomaly
A result that does not fit the overall pattern shown by the other data.
Anomaly
A value that does not fit the general pattern of the other data.
Anomaly
A result that does not fit the pattern of the other results and may not be part of their ordinary variation.
Anomaly
A result that stands out because it does not fit the general pattern of the data.
Anomaly
A value or observation that differs from the general pattern and may need further investigation.
Anomie
A condition in which the norms regulating behaviour weaken or break down. For Merton, an excessive emphasis on success can undermine the rules governing how it should be achieved.
Anonymisation
The removal or alteration of identifying details to protect privacy. Published police crime locations are moved to nearby anonymous map points rather than showing exact addresses.
Anonymity
Being unknown to the people around you, making it harder for others to identify you or know your behaviour.
Anonymity
Protection that prevents a research participant’s identity from being revealed or worked out from the information presented.
Anonymity
A situation in which a participant's identity cannot be linked to their data.
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