Subtracting negative numbers Whiteboard exercise Play

Subtracting negative numbers Student activity Play

Subtraction of two vectors Animation Play

Synthesis of ammonia on an industrial scale Animation Play

Synthesis of ammonia on an industrial scale Whiteboard exercise Play

Synthesis of sulphuric(VI) acid from sulphur dioxide Animation Play

Temperature Animation Play

The addition of hydrogen to alkenes Animation Play

The capacity of a cell Student activity Play

The capacity of a cell Animation Play

The cosine – reducing angles Student activity Play

The debt is decreasing Whiteboard exercise Play

The debt is increasing Whiteboard exercise Play

The debt is increasing. The debt is decreasing Student activity Play

The decimal as a negative exponent Whiteboard exercise Play

The decimal representation and the negative exponent Whiteboard exercise Play

The developing of film Animation Play

The distribution of electrons Animation Play

The effects of mutations in somatic cells – negative for the organism but positive for humans Slideshow Play

The electrochemical series Student activity Play

The energy changes during the course of a chemical reaction Animation Play

The flow of charge through a conductor Animation Play

The flow of charge through an insulator Animation Play

The force of attraction Animation Play

The Friedel–Crafts alkylation Animation Play