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youtube/watch?v=7xWWowXtuvA&feature=related

http:// www.youtube.com/watch?v=7xWWowXtuvA&feature=related. By the end of today’s lesson all of you will: Identify evidence to prove continental drift Know how the tectonic plates move Know what happens when convection currents rise or fall. Some of you will:

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  1. http://www.youtube.com/watch?v=7xWWowXtuvA&feature=related

  2. By the end of today’s lesson all of you will: • Identify evidence to prove continental drift • Know how the tectonic plates move • Know what happens when convection currents rise or fall. Some of you will: • Understand how density and viscosity affects plate movement. How the Earth’s surface moves Key terms: Convection currents, tectonic plates, plate boundaries. Continental drift

  3. Today I am looking for: Good collaboration Clear communication – in written and verbal form.

  4. Starter – True or False The lithosphere consists of the Crust and upper mantle and is divided into tectonic plates. Convection currents are driven by the heat from the earths core Heat and pressure cause stress in the crust and it breaks up Basaltic rocks are less dense than granitic rocks The heat in the core is due to the pressure of overlying material and radioactivity True True True False True

  5. 250 million years ago Evidence

  6. Evidence

  7. Same rocks found across ocean basins Termination of mountain chains • Glacial deposits found at • equator • Coral reefs in Antarctica

  8. http://education.sdsc.edu/optiputer/flash/convection.htm

  9. (5 marks)

  10. Answer – swap books peer assess Continental rocks are lower in density (1 mark) and, having cooled slowly below the surface (1 mark), are made up of larger crystals (1 mark)of minerals such as quartz and feldspar (1 mark). The oceanic crust is denser (1 mark) and finer grained (1 mark), having cooled more rapidly on the surface (1 mark). Now self assess your own learning WWW/ EBI

  11. Conservative margin

  12. Homework On VLE >geography>GCSE geography>restless earth > lesson 2 > A-C 0r foundation 2 homeworks

  13. Rising

  14. Falling

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