The weight of the rocks in the crust and upper mantle results in the pressure that allows diamonds to form.
The bulk of the ocean floor is composed of ?
S waves arrive second after an earthquake.
denser
compass magnets can be deflected by earths magnetic field or other permanent magnets
Continental rise is something the passive continental margin has that the active margin does not
The continental crust is up to 70 km thick.
Tidal heating supports the dynamo theory. Magnetized lunar rocks and asteroids are used for evidence of this.
http://phys.org/news/2012-10-evidence-dynamo-asteroid.html
Earth's outer core contains liquids that conduct electricity.
Earth's outer core is a liquid. Earth's core contains mostly iron and nickel.
At ocean ridges
Limestone
magnetic stuff...