A water wheel Student activity Play

A water wheel Whiteboard exercise Play

Abiotic factors Slideshow Play

About cells Student activity Play

About the experiment Whiteboard exercise Play

Absolute values of entropy Student activity Play

Absorption of water by plants Slideshow Play

Acid dissociation constant and pH (1) Student activity Play

Acid dissociation constant for ethanoic acid Animation Play

Acid dissociation constant for lactic acid Animation Play

Acid dissociation constant Ka Student activity Play

Acid rain destroys forests Animation Play

Acid-base reactions of metal ions Class activity Play

Acid-base reactions of metal ions Whiteboard presentation Play

Acid-base titration Class activity Play

Acid-base titration Whiteboard presentation Play

Acidic oxides Animation Play

Acidic properties of hydrogen halides Student activity Play

Acidity reaction (hydrolysis) of metal ions Student activity Play

Acids (1) Student activity Play

Acids (1) Whiteboard exercise Play

Acids around us Whiteboard exercise Play

Acid–base reactions in a non-aqueous medium Animation Play

Adaptation of organisms to osmosis Slideshow Play

Adaptation of the root to absorbing water from the soil Slideshow Play