OCR GCSE Geography B key terms

A broad measure of national self-sufficiency, calculated by dividing the farmgate value of domestic raw food production by the value of raw food available for human consumption, then multiplying by 100.

The amount of output produced for a given input, such as output per worker.

The underlying structure or concept of a television programme, which can be adapted to make local versions in different countries.

The share of a whole represented by one part, calculated as $\frac{\text{part}}{\text{whole}}$.

Symbols whose sizes represent quantities. For proportional circles or squares, symbol area is proportional to the value represented.

An attraction of a destination that encourages people to move there.

A condition in a person's place of origin that encourages them to leave.

Information expressed as descriptions or categories, such as opinions about a place.

Information expressed as numbers, such as rainfall totals or pedestrian counts.

A boundary dividing ordered data into quarters. The lower quartile, $Q_1$, has approximately 25% of values below it; the upper quartile, $Q_3$, has approximately 75% below it. The median is the second quartile.

The most recent geological period, beginning approximately 2.6 million years ago and continuing to the present.

Knowledge-based economic activities involving research, innovation and the development of information or technology.

A circular graph with several axes extending outwards from a shared centre.

Energy travelling as electromagnetic waves. Incoming sunlight is mainly short-wave radiation; Earth emits energy as long-wave infrared radiation.

A relatively dry area on the sheltered side of high land, where air has lost moisture as rain on the windward side.

Selecting a sample by chance so that each member of the defined population has an equal chance of selection.

The difference between the largest and smallest values in a dataset.

A comparison of two quantities in a stated order, written using a colon, such as $1:4$.

The consistency of results when measurements or observations are repeated under comparable conditions.

The height and shape of the land.

Rainfall caused when moist air is forced to rise over higher land, cools and condenses.

How well a sample reflects the wider population, places or conditions being investigated.

A subset of people, places or observations selected to reflect the relevant characteristics of the wider group being investigated.

A store of water, often created by building a dam across a river and flooding the land behind it.

The danger that remains after measures have been taken to reduce a hazard’s effects.

The ability of a community or system to cope with disruption and continue meeting its needs.

The movement of people back into an urban area from surrounding areas.