£££ Jack Oughton - Planetary Science Presentation 03 - A Brief Guide To Terrestrial Magnetism and Field Reversals.ppt
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![All known magnetic fields are caused by the movement of electrical charges . Electrons in orbit in atoms give rise to magnetic fields, so that every atom is, like the Earth, surrounded by a magnetic field Magnetism in a nutshell ,[object Object],[object Object],[object Object],[object Object],A magnet cannot have a single North pole or a single South pole, which would be called a ‘monopole’](https://image.slidesharecdn.com/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt2874/75/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt-3-2048.jpg?cb=1669210953)
![Importance of the poles ,[object Object],[object Object]](https://image.slidesharecdn.com/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt2874/75/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt-4-2048.jpg?cb=1669210953)
![The Magnetic Field ,[object Object],[object Object],[object Object]](https://image.slidesharecdn.com/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt2874/75/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt-5-2048.jpg?cb=1669210953)
![Our Magnetic Field / The Magnetosphere ,[object Object],[object Object],[object Object],[object Object]](https://image.slidesharecdn.com/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt2874/75/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt-6-2048.jpg?cb=1669210953)
![[object Object],[object Object],[object Object]](https://image.slidesharecdn.com/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt2874/75/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt-7-2048.jpg?cb=1669210953)
![Cause of the Field – The Dynamo effect ,[object Object],[object Object],[object Object],[object Object]](https://image.slidesharecdn.com/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt2874/75/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt-8-2048.jpg?cb=1669210953)
![[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]](https://image.slidesharecdn.com/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt2874/75/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt-9-2048.jpg?cb=1669210953)
![what does the magnetic field do ? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]](https://image.slidesharecdn.com/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt2874/75/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt-10-2048.jpg?cb=1669210953)
![Magnetic Polar Wandering ,[object Object],[object Object],[object Object],[object Object]](https://image.slidesharecdn.com/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt2874/75/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt-11-2048.jpg?cb=1669210953)
![[object Object],[object Object]](https://image.slidesharecdn.com/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt2874/75/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt-12-2048.jpg?cb=1669210953)
![How do we tell there have been shifts in the past? ,[object Object],[object Object],[object Object],[object Object],[object Object]](https://image.slidesharecdn.com/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt2874/75/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt-13-2048.jpg?cb=1669210953)
![[object Object],[object Object],[object Object],[object Object]](https://image.slidesharecdn.com/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt2874/75/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt-14-2048.jpg?cb=1669210953)
![Paleoreversal / ‘flips’ ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]](https://image.slidesharecdn.com/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt2874/75/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt-15-2048.jpg?cb=1669210953)
![[object Object],[object Object],[object Object],[object Object],[object Object]](https://image.slidesharecdn.com/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt2874/75/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt-16-2048.jpg?cb=1669210953)
![Measuring The Field’s Changes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]](https://image.slidesharecdn.com/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt2874/75/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt-17-2048.jpg?cb=1669210953)
![[object Object],[object Object]](https://image.slidesharecdn.com/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt2874/75/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt-18-2048.jpg?cb=1669210953)
![The Reversal In Fiction ,[object Object],[object Object]](https://image.slidesharecdn.com/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt2874/75/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt-19-2048.jpg?cb=1669210953)
![The Orion Prophecy – an example ,[object Object],[object Object],[object Object],[object Object]](https://image.slidesharecdn.com/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt2874/75/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt-20-2048.jpg?cb=1669210953)
![Summary – Realistic Outlook? ,[object Object],[object Object],[object Object],[object Object],[object Object]](https://image.slidesharecdn.com/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt2874/75/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt-21-2048.jpg?cb=1669210953)
![References ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]](https://image.slidesharecdn.com/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt2874/75/jack-oughton-planetary-science-presentation-03-a-brief-guide-to-terrestrial-magnetism-and-field-reversalsppt-22-2048.jpg?cb=1669210953)
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£££ Jack Oughton - Planetary Science Presentation 03 - A Brief Guide To Terrestrial Magnetism and Field Reversals.ppt
- 1. A Brief Guide To Magnetism, Terrestrial Magnetic Field and Polar Reversals Jack Oughton
- 2. Definitions Dynamo - A system that uses electromagnetic induction to convert mechanical energy (motion) into a magnetic field Ferromagnetism is believed to be caused by magnetic fields generated by the electrons' spins in combination with a mechanism known as exchange coupling , which aligns all the spins in each magnetic domain. Curie temperature (Tc ) The temperature above which a ferromagnetic material loses its permanent magnetism. In minerals, lightning often flash-heats minerals above their Curie temperatures, effectively resetting the magnetic fields trapped in lava flows.
Notes de l'éditeur
- * the Utopia impact injected so much heat into the Martian mantle that it drastically reduced the temperature difference driving the dynamo.
- There is also true polar wandering which appears to be linked to plate movements and provides proof of continental drift . the above picture is Ellef Ringnes Island , the location of Earth's North Magnetic Pole in 1994
- * An ESA Satellite program designed to give a more precise reading of the field and a representation of the magnetic field’s changes over time
- The Orion Prophecy – one of the most influential psuedoscientific books