Key terms & definitions

The capital of the Aztec Empire, built on an island in a lake, which Cortés and his men entered on 8 November 1519.

A projecting section at the end of a timber component that fits into a mortise.

A grammatical form of a verb that helps locate an action or state in time, such as ‘walks’ or ‘walked’.

A material's ability to withstand a pulling force without breaking or stretching excessively.

The ability of a material to withstand stretching forces without breaking.

Resistance to being pulled apart by a tensile force.

The pulling force exerted by a stretched rope, string or cable.

The pulling force exerted on an object by a stretched rope, string or cable, acting along it.

A feeling of uncertainty or anticipation about what might happen, often involving danger, conflict or a difficult choice.

A pulling action transmitted through a material when forces pull its ends away from each other.

A range of solvent-based adhesives for joining compatible thermoplastics; Tensol 12 is commonly used for acrylic.

An answer supported by the available evidence but open to revision if further evidence changes the explanation.

One of ten equal parts of a whole; the first place to the right of the decimal point.

The conditions under which someone held land from a lord.

A warm room in a Roman bath building, providing a gentler temperature than the hot room.

A unit of data equal to 1,000 gigabytes or 1,000,000,000,000 bytes, written TB. The prefix tera means $10^{12}$.

A unit of data equal to 1,000 gigabytes using the decimal convention.

A stanza containing three lines.

One item in a sequence; its position is usually numbered $1,2,3,\ldots$.

Feedback received after a performance has finished.

A ridge of glacial debris deposited at the furthest position reached by a glacier's snout.

The constant velocity reached by an object moving through a fluid when the resistive force balances the driving force, so the resultant force and acceleration are zero.

The constant velocity reached by a falling object when the forces balance and its acceleration becomes zero.

A decimal that has a finite number of digits after the decimal point, such as $0.375$.

A federal policy intended to end recognition of particular Native American tribes and their special relationship with the United States government.

A component at the end of a bus cable that absorbs signals, preventing them from reflecting back along the cable.

The variable $n$ used to represent a term's position in a sequence, with $n=1$ for the first term, $n=2$ for the second term, and so on.

The positive integer $n$ identifying a term's position in a sequence: $1$ for the first term, $2$ for the second, and so on.

A rule that produces each new term from one or more preceding terms.

The result produced by a sequence rule at a particular position; it may be written as $T(n)$.