Scientists find hidden layer in Earth’s inner core

The video discusses Earth's structure, traditionally known to have four layers: crust, mantle, outer core, and inner core. A new study from the Australian National University suggests an additional layer within the inner core, primarily composed of iron and about two-thirds the size of the moon. This finding implies a significant event in Earth's early history, possibly 4.5 billion years ago.

How many layers does the Earth traditionally have?

• Eight

• Six

• Four

• Two

Which institution conducted the study on the Earth's additional layer?

• Oxford University

• Australian National University

• Stanford University

• Harvard University

What is the primary composition of the newly discovered innermost core?

• Silver

• Nickel

• Iron

• Gold

How does the size of the innermost core compare to the moon?

• Same size as the moon

• Twice the size of the moon

• Half the size of the moon

• Two-thirds the size of the moon

What does the study suggest about the formation of the innermost core?

• It formed due to a recent volcanic eruption

• It formed due to tectonic plate movements

• It formed due to a cataclysmic event early in Earth's history

• It formed due to gradual cooling of the Earth