Global challenges

This video explains fractional distillation - the separation of crude oil into fractions.

Alisha Kakar explains which gases scientists think may have been present in Earth’s early atmosphere

Alisha Kakar explains the different properties of alloys and pure metals

Big Manny explains how and why aluminium is extracted using electrolysis

Alisha Kakar explains how monomers link to form polymers in a process called addition polymerisation

Alisha Kakar explains how the Haber process uses a reversible reaction to produce ammonia