Absorption of infra-red radiation Student activity Play

Absorption of light by transition metal ions Animation Play

Absorption of the photon energy Animation Play

Absorption of visible light Animation Play

Absorption spectra Student activity Play

Activation energy Animation Play

Active and passive transport Whiteboard exercise Play

Active transport Student activity Play

Active transport Animation Play

Addition of hydrogen bromide to ethene Whiteboard exercise Play

Advantages and disadvantages of using renewable energy sources Animation Play

Aerobic and anaerobic respiration in the human organism Student activity Play

Aerobic respiration Animation Play

Aerobic respiration Slideshow Play

Aerobic respiration Student activity Play

Aerobic respiration in plants Student activity Play

Agriculture – the conservation of biodiversity Whiteboard presentation Play

Agriculture – the conservation of biodiversity Class activity Play

All electromagnetic waves transmit energy Whiteboard exercise Play

All or nothing response Animation Play

All salts are electrolytes Animation Play

Amplitude of a spherical wave Animation Play

Amplitude of a spherical wave Student activity Play

Amplitude of a spherical wave Whiteboard exercise Play

An electric circuit Student activity Play