What is a fact about the earths outer core?

Answer 1

• The Earth's outer core is composed mainly of liquid iron (85 %) and nickel (5 %) with the rest made up of a number of other elements
• The outer core is 2,260 km thick
• The outer core's upper boundary is 2,890 km (1,806 miles) below the surface
• The outer core's lower boundary is 5,150 km (3,219 miles) below the surface
• The temperature of the outer core varies from 4400 degrees C at it's upper boundary and 6100 degrees C at it's lower boundary
• The outer core accounts for approximately 31 % of Earth's mass

  The layer above the outer core is known as the mantle and the boundary itself is known as the Gutenberg discontinuity, named after the the German geophysicist Beno Gutenberg who discovered it. Gutenberg is also famous for his work with Charles Richter in the development of the Richter magnitude scale.

• The layer below the outer core is the inner core and this boundary was discovered by the Danish geophysicist Inge Lehmann
• Geophysicists currently believe that the convection of the molten iron in Earth's outer core produces Earth's magnetic field which protects us from solar radiation and without which life on Earth as we know it would have been impossible
• Some geophysicists also believe that certain mantle plumes form at the boundary between the outer core and the mantle due to the very high differences in temperature (the outer core is much hotter than the base of the mantle above it). It is these hot plumes that are thought to be responsible for volcanism at hot spots in the middle of tectonic plates such as the one that created the Hawaiian island chain.

Answer 2

Its a really thick layer

Answer 3

it's hot