Human earth shapers/ETHS101/Earthsystems/Geosphere

There are three (3) videos for you to watch.
 * 1) The first is about Earth's unique place in the solar system NASA-JPL-Université Paris Diderot.jpg
 * 2) The second is about Earth's interior - most of the geosphere - and
 * 3) The last video is about the workings of the outer part of Earth.

Points of interest


 * The geosphere encompasses the solid and molten rocky portions of Earth


 * Planet Earth is the third planet from the sun and the largest of the rocky planets


 * Three main shells make up the Earth: core, mantle and crust


 * Geomagnetism is the result of a liquid outer iron-nickel core convecting around a solid inner iron-nickel core and is fundamental in keeping Earth's atmosphere


 * Plate tectonics, where the lithosphere “floats” on the asthenosphere is the main driver producing the features on the surface of the Earth, including volcanism and earthquakes. It is also an important influence on topography and the amalgamation and break up of continental masses over time

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Hypothesis Challenge
'''Earth's magnetic field is fundamental to the development of life on our planet. why?'''
 * Physical Geology - Chapter 6, 9, 10 and 22.3 This open textbook will help you deepen your understanding of the geosphere, once you have engaged with the lectures. Our first Hypothesis challenge to you, is to provide your thoughts on the following question.


 * For help and guidance on using Hypothesis (OERu's Annotation software), information can be found on OERu's learner support site.
 * For your interest

The below resources are further information on the Goldilocks Zone and a new theory on how the moon formed.
 * Goldilocks Zone. This is a great resource to learn more about the Goldilocks Zone
 * New Theory on how the moon formed.

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'''The geosphere intersects the hydrosphere near and on the Earth's surface. After completing the learning activities below, find out about the watery parts of Earth on the next page'''.