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Geology

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Godfrey Franecki

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2y ago
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Cards in this guide (14)
The shadow zone exists because

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.

In which layer is the temperature the highest

the inner core

Which best describes earths north magnetic pole

Wondering slowly with no pattern

Magnetic stripes on the seafloor are caused in part by

movement of ocean crust.

The shadow zone exists due to the of seismic waves

refraction refraction

Rocks in ocean crust are as old as

200 million

What is true about compasses

compass magnets can be deflected by earths magnetic field or other permanent magnets

Why do scientists think Earth's core contains iron

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.

Why do scientists think the earths core contains iron

Iron is magnetic which forms the Earth's magnetic field.

What is an continental crust

Formed from slowly-cooled lava.

APEX;)

Which of the Earths layers is just below lower mantle

The molten bit of the Iron core.

How does the age of the oldest continental crust compare to the age of the oldest ocean crust-

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 what

The continental crust is up to 70 km thick.

what Temperature and pressure combine to keep the outer core in a state

Liquid.APEX

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