Activation energy
The energy required to initiate a chemical reaction or process.
Glossary
View film
Efficiency
The proportion of energy supplied to a device or process that is converted into a useful form.
Glossary
View film
Enthalpy change
The amount of heat energy gained or lost by a chemical system when a process or reaction takes place at constant pressure.
Glossary
View film
Respiration
The process by which an organism supplies its cells and tissues with oxygen and returns carbon dioxide.
Glossary
View film
Nuclear fusion
A nuclear reaction in which two atomic nuclei fuse to form a larger one.
Glossary
View film
Renewable energy
Energy from natural resources that are practically inexhaustible.
Glossary
View film
Curriculum films: Delivering key learning points
Context films: Showing examples in the real world
Glossary films: A visual dictionary of scientific words
FactPack films: Graphics-based films, packed with amazing facts