How does the density of material differ from the inner core to the crust?

Answer 1

dodo

• The overall density of the Earth is much higher than the density of the rocks we find in the crust. This tells us that the inside must be made of something much denser than rock.
• Meteorites (created at the same time as the Earth, 4.6 billion years ago) have been analysed. The commonest type is called a chondrite and they contain iron, silicon, magnesium and oxygen (Others contain iron and nickel). A meteorite has roughly the same density as the whole earth. A meteorite minus its iron has a density roughly the same as Mantle rock (e.g. the mineral called olivine).
• Iron and Nickel are both dense and magnetic.
• Scientists can follow the path of seismic waves from earthquakes as they travel through the Earth. The inner core of the Earth appears to be solid whilst the outer core is liquid (s waves do not travel through liquids). The mantle is mainly solid as it is under extreme pressure (see below). We know that the mantle rocks are under extreme pressure, diamond is made from carbon deposits and is created in rocks that come from depths of 150-300 kilometres that have been squeezed under massive pressures.
• -http://www.moorlandschool.co.uk/earth/earths_structure.htm

Answer 2

because the pressure is greater at the core, thus compressing the material at the center tighter than the material surrounding the core.

Answer 3

It's as simple as this, the dense, heavy stuff sunk, the less dense, light stuff floated on top.

Answer 4

outer core is liquid whereas the inner core is solid

Answer 5

The Earth's crust is solidified rock formed from the molten mantle beneath.

Answer 6

"Lighter stuff floats"

Answer 7

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Answer 8

d