Key terms & definitions

A wooden tablet covered with a thin layer of wax into which letters could be scratched.

A tough, waxy layer covering the surface of a leaf that helps prevent microorganisms entering.

A chief minister in the Mughal government.

An acid that is only partially ionised in aqueous solution.

An acid that is only partially ionised in aqueous solution.

A correlation in which the points are more spread out around the overall trend.

A relationship with a recognisable trend but more widely scattered points. AQA classifies coefficients from $0.2$ up to but not including $0.6$, or from $-0.2$ down to but not including $-0.6$, as weak.

A password that is easy to guess or discover, for example because it is short, common or predictable.

Money, property and other valuable possessions held by a person or group.

Money and valuable possessions owned by a person or group.

Assets owned, such as property, land, savings and shares.

A weapon capable of causing widespread destruction and harm without reliably distinguishing military targets from civilians; nuclear, chemical and biological weapons are the main types.

Weapons capable of causing death and destruction on a very large scale; nuclear weapons are an example.

Nuclear, chemical or biological weapons capable of causing destruction or casualties on a large scale.

Nuclear, chemical and biological weapons capable of causing destruction or casualties on a large scale.

The ability of a material to resist damage caused by rubbing against another surface.

Atmospheric conditions at a particular place and time, including temperature, rainfall and wind.

The short-term atmospheric conditions at a particular place and time.

A boundary between air masses with different characteristics, such as temperature.

An atmospheric event that can harm people, property, economic activity or the environment.

The breakdown of rock in place, without its removal.

The ability to withstand outdoor conditions, such as rain and sunlight, without unacceptable deterioration.

A London craft organisation associated with the weaving trade, which admitted many Huguenot weavers as members.

A fabric-making process that interlaces two sets of yarns, called warp and weft, at right angles.

The part of a structural section that connects its flanges, such as the central vertical part of an I-beam.

In a moulded structure, reinforcement using supporting ribs or webs to stiffen thin sections and resist deformation.

A server that stores website resources and supplies them to clients when requested.

A collection of web pages that a business can use to provide information and services online.

A standardised battery of tasks used to assess different memory functions and compare performance with age-based norms.

Waste Electrical and Electronic Equipment: discarded electrical or electronic equipment; the WEEE Directive establishes responsibilities for its collection, treatment, recovery and disposal.