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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
Flavour concentration
An increase in the amount of flavour-producing ingredients relative to the water remaining in a sauce.
Flavouring
An ingredient used to give food a particular taste or aroma.
Flavouring paste
A concentrated mixture of finely ground or blended ingredients used to add flavour, such as curry paste.
Flavour intensifier
An additive that strengthens or improves the flavour of a food.
Fleet prefect
The commander of a Roman fleet; in the Imperial period, the office placed a permanent fleet under imperial authority.
Fleming's left-hand rule
A hand rule that relates the mutually perpendicular directions of magnetic field, conventional current and force on a current-carrying conductor.
Fleming’s left-hand rule
A rule relating force, magnetic field and conventional current: the left thumb indicates force, the first finger field and the second finger current, with all three held at right angles.
Flemish migrants
Migrants from Flanders in the Low Countries, many of whom brought weaving skills to sixteenth-century England.
Flexibility
The ability to bend without breaking.
Flexibility
The ability to bend easily; a stiff material resists bending.
Flexibility
The range of movement possible at a joint.
Flexibility
The ability of a material or structure to bend or flex without breaking.
Flexible hours
An arrangement allowing employees some choice over when they complete their required working hours, within limits agreed with the employer.
Flexible manufacturing system (FMS)
An interconnected collection of adaptable, computer-controlled manufacturing machines that can change between products or tasks.
Flexible working
An arrangement allowing variation in when, where or how working hours are organised.
Flexion
A movement that decreases the angle at a joint, such as bending the elbow or knee.
Flexitime
A flexible working arrangement in which employees choose some of their working times, usually around compulsory core hours.
Flight of the Earls
The departure of leading Gaelic Irish chiefs and their followers from Ireland in 1607, after which the Crown confiscated extensive lands in Ulster.
Flintlock
A firearm mechanism that uses flint striking steel to produce sparks and ignite the gunpowder needed to fire the weapon.
Float
A length of yarn that passes over several crossing yarns before interlacing again.
Flogging
Punishment by whipping; Pilate had Jesus flogged before handing him over for crucifixion.
Flood barrier
A structure with gates across a river or estuary that can be closed to prevent high water, such as a tidal storm surge, moving inland.
Flood hazard
The potentially damaging flood event, described using characteristics such as its likelihood and depth.
Flood hydrograph
A graph showing how river discharge changes over time following a rainfall event, usually displayed alongside rainfall.
Flood plain
A broad, relatively flat area beside a river that can be covered by water during floods.
Floodplain
A broad, relatively flat area beside a river that can be covered by water when the river floods.
Floodplain retention
Keeping floodplain land available to flood, with development restricted so that water can spread and be stored with less damage.
Flood plain zoning
Restricting different land uses according to their flood risk, keeping vulnerable or high-value development away from the most flood-prone land.
Floodplain zoning
Planning controls that restrict vulnerable development on land liable to river flooding.
Flood risk
The likelihood that flooding will occur in an area.
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