Magnetic Poles &

Earth’s Tomography

Objectives:

• Determine what drives the Earth’s magnetic field & how it changes over time.

• Determine what causes the northern lights.

• Determine how indirect evidence is used to determine what the inside of the Earth is like.

• Identify features in the interior of the Earth from seismic tomography.

• Determine how convections works in the Earth.

Which way does it point?

Click here:Interactive Magnetic Field

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Green lights in the sky??

Click here for:The Northern Lights video

Click here for Northern Lights website

2

What’s a ct scan?

Click Here:

Body CT Scan

Earth’s CT Scan

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Do the wave!

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Earth shaking!

Click Here for animation:Savage Earth

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Crystals, oh my!

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Setting boundaries

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Launched in the pacific

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Half the Earth

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Seismic Tomography

What do these

depict?

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Rise and fall of magma

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Convection in the earth

Click Here for animations:

Convection #1

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Convection in the earth #2

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Hot spots in the United STates

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