Geologists claim iron snow is falling on Earth’s core

The video explains that molten iron crystallizes in the Earth's outer core, forming a layer of iron particles above the solid inner core. Researchers from Sichuan University analyzed seismic waves to understand the core's composition. They found that seismic waves travel at different speeds due to the varying thickness of the iron slurry layer. This understanding helps explain the core's role in driving tectonic plate movement and generating Earth's magnetic field.

What phenomenon occurs at the Earth's core involving iron?

• Iron melts and rises to the surface

• Iron evaporates into the atmosphere

• Iron forms a gaseous layer

• Iron crystallizes and forms a layer

Which university's associate professor led the research team?

• Harvard University

• Sichuan University

• Stanford University

• University of Oxford

What causes the difference in seismic wave speeds in the Earth's core?

• Tectonic plate movements

• Varying thickness of the iron slurry layer

• Magnetic field fluctuations

• Temperature variations

In which part of the Earth's core do seismic waves propagate more quickly?

• Southern hemisphere of the outer core

• Western hemisphere of the outer core

• Eastern hemisphere of the top inner core

• Northern hemisphere of the inner core

How does the Earth's core influence tectonic plate movement?

• Through its heat

• Through its seismic activity

• By its magnetic field

• By its gravitational pull