Mapping Magnetic Anomalies

Today's new ELI is 'Mapping Magnetic Anomalies; modelling the palaeomagnetic evidence for plate tectonic boundaries on the ocean floor'.

This ELI involves modelling plate boundaries (divergent and transform) from a simulated geomagnetic data survey. Students can describe how the pattern of magnetic stripes was collected from ocean exploration surveys and they can identify evidence of plate boundaries from the pattern of palaeomagnetic anomalies. They can also explain that magnetic anomalies and magnetic stripes are associated with reversals in the Earth’s geomagnetic field.

Related activities can be found in the following topics on our website, Magnetism, Plate tectonics and Oceanography.

Modelling ancient and modern magnetic fields, using people!

Our ELI today is 'Human magnets! - modelling ancient and modern magnetic fields, using your pupils'.

Pupils use their own bodies to model the magnetisation induced in magnetite mineral particles by the Earth’s field of today: also the magnetic evidence within ancient rocks for ‘continental drift’.

Related activities can be found in 'Magnetism' in our Investigating the Earth category.

Hotspots . . what are they?

 Today we consider 'Hotspots; modelling the movement of a plate across the globe'.

In this ELI a felt-tip pen and a piece of card are used to model the evidence of the movement of a tectonic plate over a fixed heat source in the Earth’s mantle.

Many related activities can be found in 'Plate tectonics' in our Earth energy / processes category.

Following the devastating earthquake (7.7 magnitude) which occurred in Myanmar on 28th March, today's ELI is all about seismic waves. 'The slinky seismic waves demo; using slinkies to show how earthquakes produce P-, S- and surface waves'.

In this activity, two slinky springs are used to show how one earthquake produces P-, S- and surface waves.

More activities related to Earthquakes can be found in our Natural Hazards category.