Monday, 21 June 2010

Magnetic stripes in the oceans?

Our latest Earthlearningidea is 'Magnetic stripes; modelling the symmetrical magnetic pattern of the rocks of the sea floor' This activity demonstrates the origin of the symmetrical magnetic anomalies which occur at oceanic spreading centres. It can be used to aid the understanding of remanent magnetisation in rocks. Periodic reversals of the Earth’s magnetic field are shown by the remanent magnetisation of rocks of the sea bed, which have been used to demonstrate sea floor spreading. It is an excellent way to clarify a difficult concept for your pupils, especially if they are involved in setting up the materials needed.
This is one of many really good ideas from Earthlearningidea - all activities are free to download.

No comments: