A balloon Animation Play

A biological population Slideshow Play

A change in the medium of wave propagation Simulation Play

A change in the medium of wave propagation Whiteboard exercise Play

A change in the medium of wave propagation Student activity Play

A close look at current Student activity Play

A close look at current Animation Play

A crown of gold mixed with silver Animation Play

A current-carrying conductor in a magnetic field Animation Play

A family of transition metals Animation Play

A lead cube Animation Play

A metal ball Animation Play

A state of balance Animation Play

A task for Archimedes Whiteboard exercise Play

A task for Archimedes Student activity Play

Ability to react with metal salts Animation Play

Ability to react with metals Animation Play

Absorption of light by transition metal ions Animation Play

Absorption of visible light Animation Play

Absorption of visible light. Colorimetry Class activity Play

Absorption of visible light. Colorimetry Whiteboard presentation Play

Acid-base reactions of metal ions Class activity Play

Acid-base reactions of metal ions Whiteboard presentation Play

Acidity reaction (hydrolysis) of metal ions Student activity Play

Acidity reaction (hydrolysis) of metal ions Whiteboard exercise Play