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☆☆☆☆☆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.
the inner core
Wondering slowly with no pattern
movement of ocean crust.
refraction refraction
200 million
compass magnets can be deflected by earths magnetic field or other permanent magnets
Samples of Earth's crust contain less iron than found in meteorites, and iron is a comparatively heavy element that would have sunk into the planet when it was being formed.
Iron is magnetic which forms the Earth's magnetic field.
Formed from slowly-cooled lava.
APEX;)
The molten bit of the Iron core.
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.
The continental crust is up to 70 km thick.
Liquid.APEX
