Combined Science key terms

An immune-system cell that helps defend the body against infection.

A representation of a chemical reaction using the names of its reactants and products.

Energy transferred when a force moves an object or when a current flows.

Plant transport tissue made of hollow tubes of dead cells, strengthened with lignin, that carries water and mineral ions from roots towards stems and leaves.

The amount of useful crop harvested, often measured per unit area of farmland.

A measurement error caused by a reading or reference position being displaced from its correct zero.

The single fertilised cell formed when male and female gametes join.