Los elementos: el hierro

Iron is the fourth most abundant element in Earth's crust and is essential for life. It forms red iron oxide or rust in the presence of oxygen. Iron is crucial in living organisms, particularly in blood, where it helps transport oxygen. Mars gets its red color from iron oxides, and meteorites are a source of metallic iron. Iron is widely used in industry, especially in steel production, which is much harder than pure iron. All iron on Earth was created in stars.

What is the significance of iron oxides on Mars?

Why is iron considered essential for life?