Physics

WEATHERING

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It could not be used because it attracts magnets and a compass is a specialist form of magnet, utilising the magnetic properties of the earth to give a reading.

Compass housings are invariably made of brass, aluminium or plastic.

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 angle between the geographic and magnetic poles extends more towards the east, as you move to the north. The magnetic pole is actually near Greenland.

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Landform.

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

It is important to take the declination into account when one is closer to the poles because declination varies more as a function of longitude and not the latitude. In North America, if one goes toward the east coast, the declination increases to the west. If one goes to the west coast, the declination increases to the east.

Evidence is not used to support theory.

Theory is used to explain evidence, and to predict where and how new evidence may be found.

When new evidence is found that theory can't explain, the prevailing theory is modified or discarded.

The north pole of the magnet is the one that points north. The Earth magentic pole that is near the north pole is traditionally called the "magnetic north pole", but if you consider Earth as a magnet, it is really the SOUTH pole, since the north pole of a magnet is attracted to it.

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The continental crust is up to 70 km thick.

No. A north pole of one magnet will get attracted to the south pole of another magnet; therefore the compass needle that points north points to Earth's south magnetic pole - which is in the north.Confusingly, this has traditionally been called Earth's NORTH magnetic pole, since it is to the north.