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Plate Tectonics, Continental Drift, Convection Currents & Gr
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Wegener's Theory
Alfred Wegener was a renowned German scientist who published his theory on continental drift in 1915 (Berkely)
Plate Tectonics
Plate Tectonics, Continental Drift, Convection Currents & Gravity
Plate tectonics explains the theory that Earth is made up of several plates.
The plates are the outer layer of the Earth, known as the lithosphere.
The plates move around in different motions, creating tremors along the fault line.
Ciara, Deanna, Nick & Zack
Continental Drift
To further the theory more, Alfred investigated the soil deposition and how the same soil was found in tropical climates as well as Antarctica.
Continental Drift
Wegener proposed the theory of continental drift in the twentieth century (scientus.org)
He believed that all continents were joined together at one time or another
References
His evidence to support the theory was that the continents fit together like a jigsaw puzzle (scientus.org)
Bbc.co.uk,. 'BBC - GCSE Bitesize: Wegener’S Theory'. N.p., 2015. Web. 25 Oct. 2015.
Csmres.jmu.edu,. 'Plate Tectonic Theory: Plates And Interplate Relationships'. N.p., 2015. Web. 25 Oct. 2015.
Earthobservatory.nasa.gov,. 'Alfred Wegener : Feature Articles'. N.p., 2015. Web. 25 Oct. 2015.
Pangaea.org,. 'Wegener, Alfred'. N.p., 2015. Web. 25 Oct. 2015.
Pbs.org,. 'A Science Odyssey: People And Discoveries: Alfred Wegener'. N.p., 2015. Web. 25 Oct. 2015.
Scientus.org,. 'Wegener And Continental Drift Theory'. N.p., 2015. Web. 25 Oct. 2015.
Ucmp.berkeley.edu,. 'Alfred Wegener'. N.p., 2015. Web. 25 Oct. 2015.
Ucmp.berkeley.edu,. 'Currents In The Earth's System'. N.p., 2015. Web. 25 Oct. 2015.
Gravity
Convection Currents
Gravity is the force which pulls two objects together
The bigger the mass, the stronger the pull on the objects
Convection currents and tectonic plates all have a strong pull
Convection currents are when heat transfer takes place under the Earths surface, cold air is pushed to the bottom as hot rises.
The currents occur in three places
- geosphere
- atmosphere
- hydrosphere
The currents push the boundary of the plates making them move (scientus.org)