08 - Geography 1111 11/3/08 The Nature of the Lithosphere...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Geography 1111 11/3/08 The Nature of the Lithosphere 1. Composition of the earth 2. Landforms and relief 3. Rocks and minerals 4. Rock types Composition of the Earth 3 rd planet away from the sun Core, mantle, crust Inner core: o Solid iron-reason we have a magnetic field o Extremely dense (11-13 times denser than water), due to gravity and everything weighing on it o High temperature—5400-12000 degrees F Outer core: o Molten iron-reason we have a magnetic field. o Less dense than inner core o Slightly cooler than inner core Mantle: o 80% of Earths volume o Hotter towards core…slightly cooler as you more outward o Higher pressure towards core firmer material o Mixture of silicates and heavy irons Parts of the mantle: Asthenosphere: o 3300-5100 degrees F o Plastic layer o Hot pockets—radioactive decay o convection currents o deformation of crust (due to tectonically) Uppermost mantle:
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
o Solid, brittle layer o Part of lithosphere Crust:
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

08 - Geography 1111 11/3/08 The Nature of the Lithosphere...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online