AQA GCSE Combined Science Trilogy key terms

A solution containing the maximum amount of dissolved solute at a particular temperature.

A quantity with magnitude only, and no direction.

A quantity that has magnitude (size) but no direction.

A line on an image labelled with the actual distance it represents in the specimen.

A graph plotting paired values of two numerical variables, with each point representing one individual or observation.

A representation used to explain scientific observations and make predictions, which may be changed or replaced when new evidence emerges.

An explanation supported by evidence that can be tested and revised as further evidence becomes available.

The output coil of a transformer, which supplies the outgoing electrical power.

A consumer that eats a primary consumer.

A physical feature that develops at puberty but is not a reproductive organ, such as breast development.

A tumour formed elsewhere in the body by cancer cells that have spread from the original tumour.

Solid material that settles and accumulates, for example on the ocean floor.

Rock formed from accumulated sediments that become compacted and cemented together.

The settling of suspended solids out of a liquid under gravity.

An environmental factor that affects which organisms survive and reproduce; an antibiotic is a selection pressure on bacteria.

The process by which humans choose and breed plants or animals for particular inherited characteristics; also called artificial selection.

An assessment that examines only selected parts of a product’s life cycle or selected environmental impacts.

A neurone that carries electrical impulses from a receptor to the central nervous system.

An arrangement in which components are connected end to end along a single current path.

A connection in which components lie one after another along the same path.

Wastewater containing human waste and other material carried away through drains and sewers.

The solid-rich material that settles at the bottom of a sewage settlement tank.

A chromosome belonging to the pair that carries genes determining biological sex. In the human inheritance model, females have XX and males have XY.

An infectious disease passed between people through sexual contact.

Reproduction involving the fusion of male and female gametes and the mixing of genetic information.

The reduction in the attraction between the nucleus and an outer electron caused by electrons in inner shells.

A perforated end wall between adjoining phloem sieve-tube cells, allowing dissolved substances to pass through.