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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
Endothermic
A process that absorbs energy from the surroundings. An endothermic chemical reaction has a positive overall energy change.
Endothermic change
A change or reaction in which heat energy is taken in from the surroundings.
Endothermic change
A change or reaction in which heat energy is taken in from the surroundings.
Endothermic direction
A reaction direction that takes in energy from the surroundings.
Endothermic process
A process that takes in energy from its surroundings.
Endothermic process
A process that takes in energy from the surroundings.
Endothermic process
A chemical process that requires energy to be transferred into it from its surroundings.
Endothermic reaction
A reaction in which energy is transferred from the surroundings to the reacting system.
Endothermic reaction
A reaction that takes in energy from the surroundings, leaving the products at a higher energy level than the reactants.
Endothermic reaction
A reaction that takes in energy from its surroundings.
Endowed hospital
A hospital established or supported through a gift of money or property intended to finance its work.
End point
The point at which the chosen measurable change shows that a reaction has finished or reached a specified stage.
End point
The point in a titration at which the indicator shows a lasting colour change.
End point
The point in a titration at which the indicator shows its lasting colour change.
Endpoint
The stage at which the measured reaction is judged to be complete; here, it is the first sample in which iodine detects no starch.
Endpoint
An observable point chosen to stop timing a reaction, such as a specified colour change.
Endpoint
An observable point used to stop timing a reaction, such as the first sample that no longer turns iodine blue-black.
End-stopped line
A line of verse that finishes with a grammatical pause, often marked by punctuation.
Endurance
The ability to sustain exercise over time; aerobic endurance depends on supplying oxygen to working muscles.
End user
The person who will actually use a product.
Enemy alien
A wartime classification for someone whose nationality connected them to a country at war with Britain; it did not necessarily indicate their political loyalties.
Energy
The capacity of a system to bring about change; energy is stored and transferred, and is measured in joules (J).
Energy
A quantity that can be stored and transferred, including by doing work. Energy is a scalar measured in joules (J).
Energy
Sustained effort and determination in Buddhist practice and doing good; also called virya.
Energy access
The ability to obtain and use energy resources, supported by suitable technology and infrastructure.
Energy balance
The balance between energy taken in through food and drink and energy used by the body.
Energy balance
The relationship between energy taken in through food and drink and total energy used by the body.
Energy balance
The relationship between energy taken in through food and drink and energy used by the body.
Energy carrier
A substance that stores and delivers energy obtained from another source. Hydrogen is an energy carrier rather than a primary energy source.
Energy change
The energy transferred overall during a chemical reaction; it equals the energy needed to break bonds minus the energy released when new bonds form.
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