Key terms & definitions

The time after exercise during which heart rate falls towards its resting level.

Planned steps for restoring data, software and working systems after a failure, attack or disaster.

How quickly pulse rate falls back towards its resting value after exercise.

How quickly pulse rate returns towards its resting value after exercise. Faster recovery usually means a shorter recovery time.

The time from the end of exercise until a measured rate returns to its resting level.

The time taken after exercise stops for pulse rate to return to the person’s resting rate.

The time taken for heart rate to return to its resting level after exercise.

An activity undertaken for enjoyment during leisure time, including sport and exercise.

A drug taken for enjoyment rather than for medical purposes, such as alcohol or nicotine.

The process of bringing people into the armed forces, either as volunteers or through compulsory service.

The process of attracting and identifying suitable candidates for a job vacancy.

A business that carries out recruitment tasks on behalf of an employer, such as advertising vacancies and shortlisting applicants.

A quadrilateral with four right angles.

A figure made entirely from straight line segments.

A shape whose sides are straight and meet at right angles.

Firm commitment to morally correct behaviour. Nancy’s rectitude makes her dependable, but her certainty about what is right can become inflexible.

A rule such as $P_{n+1}=kP_n$ that defines each term using an earlier term.

A rule that defines a term using one or more preceding terms.

The digit or block of digits that repeats indefinitely in a recurring decimal.

A decimal in which a digit or block of digits repeats for ever, such as $0.\overline{27}=0.272727\ldots$.

A rule that defines each value using one or more earlier values, such as $x_{n+1}=g(x_n)$.

A rule that defines a term using one or more earlier terms in the same sequence.

Refusal to attend the legally required Church of England services; in Elizabethan England, it was particularly associated with Catholics.

A person who refused to attend the required Church of England services, usually because of Catholic beliefs.

The extent to which a product’s materials can be recovered and processed into usable materials for new products.

An energy resource whose materials can be reused or regrown. In this Edexcel classification, nuclear fuel and biofuels are recyclable resources.

Processing material from a used product to make a new product.

Processing used materials so that they can be made into new products.

The proportion of a material made from recovered material rather than entirely new raw material.

Paper manufactured using recovered paper fibres, sometimes mixed with new, unused pulp.