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☆☆☆☆☆The Earth's core.
the mantle and core are composed of different material
P waves refract as they travel through Earth. The shadow zone exists because of seismic waves. The shadows show when the earth spins around.
Wandering with no pattern
core
. The south magnetic pole of the compass points to Earth's north magnetic pole.
Wondering slowly with no pattern
The sun's pole reversal is tied to the cycle of sunspots.
The suns pole reversals are tied to its seasons. This can be shown on a graph.
The oldest continental crust would be between three and one half to four billion years older than the oldest oceanic crust. This is due to the fact that ocean plates are subducted under the continental plates, subjected to partial melt and essentially recycled in the mantle before reforming.
denser
compass magnets can be deflected by earths magnetic field or other permanent magnets
Existing
The molten bit of the Iron core.
They proved that the seafloor was spreading.
The continental crust is up to 70 km thick.
The north of the compass points to Earth's magnetic south pole, which is to the north.
magnetic stuff...
