AQA GCSE Combined Science: Synergy key terms

The process in which an ion gains or loses electrons at an electrode to form a neutral product.

A condition that stops part of the body from working properly and causes symptoms.

A reaction in which a more reactive element replaces a less reactive element in a compound.

A reaction in which a more reactive element replaces a less reactive element in a compound.

A representation showing every atom and every covalent bond in a molecule.

The spreading of energy into less useful stores, usually the thermal stores of objects and their surroundings.

The total length of the route travelled by an object, measured in metres. It is a scalar quantity.

A graph showing how an object's distance travelled, or distance from a specified point, changes with time. Its axis label identifies which distance is shown.

The liquid collected when vapour condenses during distillation.

The pattern of where organisms occur within an area.

A molecule that carries genetic information. It is a polymer made of two strands twisted into a double helix.

The copying of DNA before cell division.

Determining the order of bases in a DNA molecule so that sequences can be studied and compared.

An allele expressed in the phenotype even when only one copy is present.

The amount of a drug given at one time.

A representation showing outer-shell electrons as dots and crosses to indicate which atoms originally supplied them.

A trial in which neither the patients nor the doctors assessing them know who receives the tested drug or the comparison treatment until the trial is complete.

The shape formed by two strands winding around one another, like a twisted ladder.

A resistive force exerted by a fluid that opposes an object's motion through it.

The spread of pathogens in tiny droplets released by an infected person, which another person breathes in.

A circulatory system with two circuits, one between the heart and lungs and another between the heart and the rest of the body. Blood passes through the heart twice during one complete circulation.

The state reached in a closed system when the forward and reverse reactions continue at exactly the same rate.

Magnetism that changes over time, rather than remaining fixed.

The electrical potential of the ground, taken as the reference value of 0 V.

The green-and-yellow-striped safety wire connected to an appliance's metal case; it provides a path for current if a fault makes the case live.

A community of organisms interacting with each other and with the non-living parts of their environment.

A muscle or gland that carries out a response.

Bubbling or fizzing caused by gas being released from a liquid.