Overload and short-circuit Student activity Play

Peptide bonds, polypeptides and proteins Student activity Play

Pesticides in the food chain Slideshow Play

Physical properties of straight chain and branched alkanes Student activity Play

Physical properties of straight chain and branched alkanes Whiteboard exercise Play

Plastic sulphur Whiteboard exercise Play

Polipeptides and proteins Animation Play

Polymerase chain reaction Animation Play

Polymerase chain reaction (PCR) Animation Play

Producers and consumers in a typical food chain Illustration Play

Pyramids of numbers Student activity Play

Soaps Student activity Play

Source of electricity Animation Play

Stages of the polymerase chain reaction Whiteboard exercise Play

Straight carbon chain Whiteboard exercise Play

Structural isomerism: chain isomers Whiteboard exercise Play

Structural isomerism: chain isomers Student activity Play

Structure of a peptide chain Animation Play

The catenary Animation Play

The chain rule Animation Play

The chain rule Student activity Play

The chain rule Whiteboard exercise Play

The chain rule for more than two functions Student activity Play

The chain rule for more than two functions Animation Play

The flow of chemical energy through the food chain Animation Play