The video explains how metals react with oxygen, focusing on oxidation and corrosion. Aluminium forms a protective oxide layer that prevents further reaction, while iron rusts when exposed to water and oxygen, forming hydrated iron oxide. The video highlights both destructive and beneficial aspects of oxidation.

What happens to metals when they are heated in air?

Describe the process of rusting in iron.

How does aluminium oxide act as a protective layer for aluminium?

Explain the significance of the oxide layer on aluminium in food packaging.

What are the two ways metals can react with oxygen as mentioned in the text?