The Dynamics of Earth's Magnetic Field

Earth's inner core has a radius of approximately ______ kilometers and is encased by the fluid outer core.

The fluid outer core extends up to ______ kilometers from Earth's center, contributing to the magnetic field.

The core-mantle boundary is cooler than the inner core, which reaches temperatures close to ______ Kelvin.

Define geodynamo.

Explain magnetic induction equation role in geodynamo.

Factors determining magnetic diffusivity in geodynamo.

The ______ in the Earth's outer core are crucial for powering the ______.

Hot, less dense fluid rises while cooler, denser fluid ______, due to ______ differences.

Columnar rolls aligned with the Earth's rotation axis are formed due to the ______ effect.

Iron solidifying onto the inner core expels lighter elements, which then promote ______ in the outer core.

The movement of the conductive fluid in the outer core is vital for the ______ of the Earth's magnetic field.

Geodynamo amplification process

Mantle's role in shielding seed field

Magnetic field strength in outer core

The models work by solving complex ______ on a three-dimensional grid.

The ______ of the Earth's core is the focus of these numerical models.

The resolution of these simulations is limited by the available ______.

Early models, known as ______, predicted magnetic effects based on fluid motions.

Since the ______, more advanced self-consistent models calculate fluid motions and magnetic fields together.

These advanced models have been able to replicate features of the Earth's magnetic field, such as ______.

Role of seawater in geomagnetic field alterations

Influence of temperature on oceanic magnetic interaction