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EARTH’S INTERIOR

Monday - October 22, 2018 9:38 am , Category : Fun Facts

WTN- Novelist Jules Verne imagined journeying to the center of the Earth in his 19th century science fiction classic by that same name, but no human has really ventured deeper than Earth’s crust let alone all the way to the core at its center.

Extremes of temperature and pressure make the almost 4,000 mile undertaking impossible. The deepest mine shaft extends no more than 2.5 mile beneath Earth’s  surface. Interior sample drilling has penetrated only 8 miles down.

Scientists gather information about Earth’s interior by recording , imaging, and measuring vibration , or seismic waves, caused by earthquakes or explosions. The movement and the speed of seismic waves as they travel through Earth provide  data that inform us about the composition and  structure of Earth’s interior.

  Earth may have started out as a cold planet and heated up, or it may have been a molten planet that eventually cooled on the outside. Scientists do not yet agree on those point. Either way, complex geologic events created the present structure of earth’s core.

  The inner part of the core is made of superhot , iron-rich material. The temperature there may be as high as 10,000O F, as hot as Scientists believe it gets on the surface of the sun. The  pressure on the inner core is so intense that it remains solid and does not melt , despite such high temperatures.

The outer part of the core likely is molten iron and nickel. The entire core is some 4,350 miles in diameter, more than half of Earth’s diameter. Studies of Earth’s interior suggest that the outer boundary of the core may be irregular , much like Earth’s surface.

-Window To News
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