Alkali metals and their reactions to air and water

The relative speeds of surface corrosion of alkali metals and their reaction with water.

Changes of state

A description of melting, evaporation and sublimation.

Changes of the state of water

A description of evaporation and condensation of water as it changes state.

Conduction, convection and radiation

A glass of iced water in the sun is used to illustrate three types of thermal transfer.

Conduction, convection and radiation

An explanation, with particle animations, of conduction, convection and radiation.

Filtration and distillation

Demonstrates how to separate sand and salt from water by filtration and distillation.

Fleming and the discovery of penicillin

Sir Alexander Fleming on how he discovered the world's first antibiotic, penicillin.

Formation of ammonia using the Haber Process

The Haber Process creates ammonia by sparking a mixture of nitrogen and hydrogen.

Galvanising iron and steel to prevent corrosion

The galvanising process and how it creates a barrier against corrosion.

How long is a piece of string?

Is it possible to measure the exact length of a piece of string?

3 learner guides

We have a selection of learner guides