A change in the intensity of X-radiation Whiteboard exercise Play

A compound containing a long hydrocarbon chain with the CCl3 group Animation Play

A compound containing polar hydroxyl groups along the hydrocarbon chain Animation Play

A sponge and its structure Whiteboard exercise Play

A typical compound Slideshow Play

A V-shaped molecule of sulphur dioxide Animation Play

About cells Student activity Play

Absolute values of entropy Student activity Play

Absorption of digestive products – role and adaptations of the small intestine Student activity Play

Absorption of visible light. Colorimetry Whiteboard presentation Play

Absorption of visible light. Colorimetry Class activity Play

Accurately determining an unknown molarity of acid/base by titration Student activity Play

Accurately determining an unknown molarity of acid/base by titration Whiteboard exercise Play

Acetylcholine structure Illustration Play

Acid rain destroys forests Animation Play

Acids (2) Student activity Play

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

Addition of HCl to propene Animation Play

Addition of hydrogen cyanide Whiteboard exercise Play

Addition of hydrogen cyanide Student activity Play

Age and sex structure of populations Student activity Play

Age structure of populations Slideshow Play

Air Student activity Play

Aliphatic amines: properties as bases Student activity Play

Alkadienes and cycloalkenes Student activity Play