Key terms & definitions

The extent to which an aqueous solution is alkaline, represented by its pH.

A hydrocarbon whose carbon atoms are joined by single bonds only.

A saturated hydrocarbon containing only single bonds between carbon atoms.

A hydrocarbon containing a carbon–carbon double bond, C=C.

An unsaturated hydrocarbon containing a carbon–carbon double bond, $\mathrm{C=C}$.

The carbon–carbon double bond, C=C, that gives alkenes their characteristic reactions.

The Creator: Allah brings everything into existence.

The Arabic word for God, used by Muslims for the one God whom they worship.

A claim, often made against a person or group, that has not necessarily been proved.

Loyalty owed to a ruler or lord.

An interpretation that treats a story as conveying symbolic or spiritual meaning rather than a literal account of events.

A narrative that can be read as representing another situation or set of ideas beyond its literal events.

A story in which particular characters, objects or events represent other things, giving it a deeper meaning.

A story whose characters and events can also represent wider ideas or conflicts beyond its literal plot.

A form of a gene. Different alleles contribute to genetic variation within a population.

A version of a gene.

The proportion of all copies of a gene in a population that consist of a particular allele.

A version of a gene. Different alleles are genetic variants of that gene.

An expression meaning ‘praise the Lord’, used as an acclamation before the Gospel reading at Mass.

A substance in food that can trigger an allergic reaction in a person who is allergic to it.

The potential of a material to cause an allergic reaction in a susceptible person.

An immune reaction to a substance in the environment that is normally harmless.

An agreement between states to cooperate, often by providing military support against a shared enemy.

A connection between people or families that can strengthen their wealth, influence or social position; marriage can create such a connection.

A group of states or forces cooperating against a common enemy. The Greek alliance at Salamis contained states with different priorities.

The body through which the American, British, Soviet and French military commanders exercised joint authority over matters affecting Germany as a whole after its defeat.

A sauce-making method in which fat, flour and liquid are combined at the start, then heated while being whisked.

Repetition of the same consonant sound at the beginnings of nearby words.

The repetition of an initial consonant sound in nearby words.

Deciding which experimental condition or conditions each participant will complete.