A thermodynamic system and the surroundings Whiteboard exercise Play

A throw of a ball Whiteboard exercise Play

A tokamak Student activity Play

A tokamak Slideshow Play

A tokamak Whiteboard exercise Play

A waterfall Animation Play

Ability to react with carbonates Animation Play

Ability to react with metals Animation Play

Abiotic factors Slideshow Play

About cells Student activity Play

About the experiment Whiteboard exercise Play

Absolute values of entropy Student activity Play

Absolute zero Animation Play

Absorption and emission of energy Animation Play

Absorption and emission of gases Simulation Play

Absorption and emission of gases Whiteboard exercise Play

Absorption and emission of gases Student activity Play

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

Absorption spectrum of gases Student activity Play

Acids (2) Student activity Play

Activation energy Animation Play