Reagents, reactants and products Student activity Play

Reducing friction Student activity Play

Refraction of light Student activity Play

Refraction of light Student activity Play

Refraction of plane waves Simulation Play

Refraction of plane waves Student activity Play

Regulation of volume of extracellular fluid Slideshow Play

Regulation of water balance in human Simulation Play

Regulation of water balance – the role of antidiuretic hormone Student activity Play

Regulation of water balance – the role of antidiuretic hormone Whiteboard exercise Play

Regulation of water loss in desert animals Whiteboard presentation Play

Regulation of water loss in desert animals Class activity Play

Relative molecular mass Student activity Play

Removing hardness from water Student activity Play

Removing hardness from water Whiteboard exercise Play

Removing permanent hardness of water Animation Play

Removing temporary hardness of water Animation Play

Renal mechanisms for conservng water Animation Play

Renewable energy resources Student activity Play

Reproduction and species Slideshow Play

Reproduction in amphibians Student activity Play

Reproduction in plants Student activity Play

Reproduction in plants Whiteboard exercise Play

Reproduction in vertebrates Chart Play

Respiration Student activity Play