Class 8 Science | The Geomagnet

Science and Technology, Class 8

The Geomagnet

The Earth is a magnet · Declination · Dip

The cause

How the Magnetism Is Born Inside the Earth

CORE

Deep inside sits the solid inner core, wrapped in the liquid outer core.

MOTION

Molten iron and nickel in the liquid core flow without stopping.

FIELD

That flow builds the geomagnetic field all around the Earth.

SHIFT

As the flow changes, the geomagnetic poles keep shifting.

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The notes are free to read in full.

Presenter notes: Open by holding up a compass. The lesson starts from one question, why does the needle always turn north.