Lewis theory and earlier acid-base theories Animation Play

Lewis theory of acids and bases Student activity Play

Lewis theory of acids and bases Whiteboard exercise Play

Mixing of atomic orbitals: sp hybridisation Student activity Play

Molecular shapes Whiteboard presentation Play

Molecular shapes Class activity Play

Muscle contraction – the sliding filament theory Student activity Play

Muscle contraction – the sliding filament theory Whiteboard exercise Play

Particle theory Whiteboard presentation Play

Particle theory Class activity Play

Particle theory and changes in state Student activity Play

Particle theory and changes of state Animation Play

Particles or waves? Student activity Play

Particles or waves? Animation Play

Particles or waves? Whiteboard exercise Play

Properties of gases Student activity Play

Properties of gases: a microscopic view Animation Play

Seeing colours Animation Play

States of matter Whiteboard presentation Play

States of matter Class activity Play

Temperature dependence of reaction rates Student activity Play

The atomic theory today Student activity Play

The atomic theory today Whiteboard exercise Play

The basis of Darwin's theory of evolution Animation Play

The chromosomal theory of inheritance Class activity Play