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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
Ease of working
How readily a material can be processed and shaped using the available tools, equipment and skills.
Easing
Distributing a small amount of extra fabric along an edge so that it fits another edge without visible folds.
Easter
The Christian festival celebrating Jesus’ resurrection; the celebrations around it also remember his suffering and death.
Easter egg
A hidden reference or clue in a media product that rewards audiences who recognise or decode it.
Easter Offensive
The major North Vietnamese attack on South Vietnam launched in late March 1972.
Easter Vigil
The celebration on the night before Easter Sunday at which Christians celebrate Jesus’ Resurrection.
East India Company
An English trading company established by royal charter in 1600, whose powers later included governing overseas settlements and raising armed forces to protect its trade.
East Indies
The Asian trading regions that Europeans hoped to reach for valuable goods; these were Columbus’s intended destination.
Easting
A numbered vertical map-grid line. Easting values increase towards the east and are read first in a grid reference.
Easy-care finish
A treatment that reduces creasing and the need for ironing, commonly by applying and curing a resin.
Eatwell Guide
The UK government model showing the proportions of five main food groups that should make up a healthy, balanced diet overall.
Eavesdropping
Listening secretly to a conversation, often without the speakers' apparent knowledge.
Ebola disease
A severe viral disease that can spread through contact with the body fluids of an infected person.
Ebro agreement
The agreement made between Hasdrubal the Fair and Rome in 226 BC that Carthaginian forces would not cross north of the River Ebro under arms.
Ebro Treaty
An agreement made between Rome and Hasdrubal the Fair in 226 BC which limited Carthaginian expansion in relation to the River Ebro.
Eccentric contraction
A muscle contraction in which the muscle lengthens while producing tension.
Eccentricity
A measure of how far Earth's orbit departs from a circular shape.
Ecclesia
The Athenian assembly, open to adult male citizens, which debated and voted on proposals and made major political decisions.
Echo
A reflected sound wave that returns to a detector.
Echo chamber
An online environment in which people mainly encounter views that reinforce their existing beliefs.
Echo sounding
A method that sends out high-frequency sound waves and detects their echoes to locate underwater objects or measure water depth.
Ecological deficit
A situation in which a population’s ecological footprint exceeds the biocapacity of the area being considered.
Ecological deficit
A situation in which resources are used faster than nature can replenish them.
Ecological devastation
Severe damage to an environment, including its vegetation, soil and water systems.
Ecological footprint
The biologically productive land and sea area needed to supply a person’s or population’s consumption and absorb its carbon dioxide emissions, expressed in global hectares.
Ecological footprint
The environmental impact associated with a product or activity, including resource use, habitat damage, pollution and carbon emissions.
Ecologically sensitive area
An area where ecosystems are particularly vulnerable to disturbance or damage.
Ecological validity
The extent to which research findings apply to behaviour in everyday settings.
E-commerce
Buying and selling goods or services online.
E-commerce
The buying and selling of goods and services over the internet.
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