AQA GCSE Combined Science Trilogy key terms

The biological material that makes up living organisms.

The living components of an ecosystem, such as plants, animals and microorganisms.

A living influence on organisms in a community, such as food availability, predators, pathogens or competitors.

The removal of colour from a substance by a chemical reaction.

A tissue consisting of plasma with red blood cells, white blood cells and platelets suspended in it.

The amount of glucose dissolved in a given volume of blood.

The liquid component of blood in which blood cells and dissolved substances are carried.

The change of state from liquid to gas throughout a liquid at its boiling point.

The temperature at which a substance changes between liquid and gas: boiling on heating and condensing on cooling.

The energy needed to break one mole of a particular type of chemical bond, usually expressed in kJ/mol. The same magnitude of energy is released when those bonds form.

The distance a vehicle travels under the braking force, from when the brakes are applied until it stops.

The number of breaths taken per minute.

The volume of air moved into or out of the lungs in one breath.

An orange solution of bromine in water that becomes colourless when it reacts with an alkene.

The first fullerene to be discovered: a spherical, hollow molecule containing 60 carbon atoms, with formula $\mathrm{C}_{60}$.

A solution that maintains a nearly constant pH during a reaction.

A property of a substance as a whole, such as its melting point, boiling point or electrical conductivity.

A thin piece of wood with a flame at one end, used to test for hydrogen gas.

A graph relating a sensor’s readings to known values of the quantity being measured, allowing later readings to be interpreted.

A disease resulting from changes in cells that lead to uncontrolled growth and division. Malignant tumour cells are cancerous.

A very small blood vessel where substances are exchanged between blood and surrounding tissues.

An enzyme that breaks down carbohydrates into simple sugars.

A compound containing carbonate ions, $CO_3^{2-}$; some carbonates are insoluble and can form sediments.

A stationary conducting contact that touches the rotating commutator, allowing current to flow between the external circuit and the coil.

Collecting carbon dioxide released by power generation or industry and storing it to prevent its release into the atmosphere.

The movement and recycling of carbon between organisms and the environment.

The total amount of carbon dioxide and other greenhouse gases emitted over the full life cycle of a product, service or event.