Key terms & definitions

An unequal relationship in which one person or group benefits from another's work at their expense.

An event in which one object, or a group of connected objects, separates into parts that move apart.

Specialist work to identify and make safe explosive devices and unexploded munitions.

The ability to exert strength at speed; another name for power.

The power $n$ in $a \times 10^n$; it shows how many places the decimal point is shifted.

The power to which a number is raised. In $10^3$, the exponent is 3, meaning $10\times10\times10$.

The raised integer $n$ in $10^n$, showing how many factors of 10 are involved or, equivalently, how far the decimal point moves.

A graph that falls because each increase of 1 in $x$ multiplies the output by a constant between 0 and 1.

A decrease in which the amount lost per unit time becomes progressively smaller, producing a curved graph.

A function in which the variable appears as a power, such as $y=k^x$, where the base $k$ is a positive constant.

A graph in which the input variable appears in the exponent, such as $y=2^x$. Equal increases in the input multiply the output by the same factor.

An increase in which the population is multiplied by the same factor during each equal time interval.

A graph that rises because each increase of 1 in $x$ multiplies the output by a constant greater than 1.

A relationship in which equal changes in the input repeatedly multiply the output by the same factor, modelled by a function such as $y=ab^x$.

Raising a number to a power, written ** in Python. For example, 3 ** 2 calculates $3^2 = 9$.

The small raised number in a power that states how many copies of the base are multiplied; in $4^3$, the exponent is 3.

Goods or services sold to other countries.

A good or service sold by a country's residents or businesses to customers overseas.

A good or service sold to a customer in another country.

An area offering incentives to businesses that produce goods for export.

Goods or services supplied by one country to customers in another country.

Goods and services sold to other countries.

The amount of exposed surface available for contact with another substance.

Background information that helps an audience understand the characters and present action.

Dialogue or other narrative information that explains the story world to the audience.

The people and property located where a natural hazard could affect them.

Contact between a substance and a person, another organism or the environment.

The way in which a substance can enter the body, such as by inhalation or ingestion.

A combination of numbers, variables and operations that represents a value but does not state that two quantities are equal.

A value, or a combination of values, variables and operators, that can be evaluated to produce a result.