Multiple choice

Which physical layer is responsible for Earth's magnetism?

  1. crust

  2. mantle

  3. outer core

  4. inner core

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The Earth's magnetic field is generated by the movement of liquid iron and nickel in the outer core, a process known as the geodynamo. The inner core is solid, while the crust and mantle do not have the liquid metal flow necessary to generate this magnetic field.