Reforming of crude oil Whiteboard exercise Play

Relative abundance of isotopes and mass spectra Student activity Play

Relative molecular mass Animation Play

Relative molecular mass Student activity Play

Resonance energy for benzene Animation Play

Responses of the sundew to different stimuli Simulation Play

Restriction enzymes Animation Play

Restriction enzymes – accurate cuts Student activity Play

Restriction enzymes – accurate cuts Whiteboard exercise Play

Reversible and irreversible reactions Student activity Play

Reversible reaction Animation Play

Role of cations in plant cells Slideshow Play

Role of enzymes Slideshow Play

Role of macro-elements absorbed as cations Student activity Play

Rupture of the DNA molecule Slideshow Play

Salts of strong acids and weak bases Student activity Play

Salts of strong acids and weak bases Whiteboard exercise Play

Salts of weak acids and weak bases Student activity Play

Saturated and unsaturated compounds Animation Play

Seed germination Animation Play

Seed germination Whiteboard exercise Play

Seed germination and development of vegetative organs Student activity Play

Sensors Animation Play

Sigma (σ) bond Student activity Play

Sigma (σ) bond Whiteboard exercise Play