A review of magnetic evidence for sea floor spreading.
Detailed sea floor spreading diagram.
Students will make a paper model illustrating the concept of sea floor spreading and the development of symmetrical magnetic stripes on either side of a mid ocean spreading center.
Seafloor spreading occurs along mid ocean ridges large mountain ranges rising from the ocean floor.
As upwelling of magma continues the plates continue to diverge a process known as seafloor spreading samples collected from the ocean floor show that the age of oceanic crust increases with distance from the spreading centre important evidence in favour of this process.
Refer back to the demonstration that you performed during the engage portion of the lesson to demonstrate this.
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A mechanism for sea floor spreading author.
The mid atlantic ridge for instance separates the north american plate from the eurasian plate and the south american plate from the african plate the east pacific rise is a mid ocean ridge that runs through the eastern pacific ocean and separates the pacific plate from the north american.
Model of sea floor spreading labeling sea floor spreading diagram quizlet seafloor spreading and plate tectonics model of sea floor spreading.
A model of sea floor spreading teacher s guide ellen p.
Another diagram just to make it clearer.
Feb 22 2015 station 2.
These age data also allow the rate of seafloor spreading to be determined and they show that rates.
Students work as individuals.
Review answers to the seafloor structure handout by filling in the diagrams on board or using smartboard.
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Sea floor spreading early 1960 s harry hess together with robert dietz seafloor spreading theory hot less dense material from below the earth s crust rises towards the surface at the mid ocean ridge material flows sideways carrying the seafloor away from the ridge and creates a crack in the crust magma flows out of the crack cools down.
Make sure to draw label an ocean ridge and deep sea trench.
Explain that seafloor spreading and movement is a cyclical process because it is constantly being created and destroyed.
A more detailed look at spreading along the red sea and east african rift valley arrows show the spreading directions title.
Labeled diagram of seafloor spreading.
All 1 250 000 and 1 1000 000 maps are overprinted with the minerals management service s ocs protraction diagram data.
Use a 1 2 sheet of paper to answer the station questions and draw a picture of the seafloor.
Seafloor spreading this diagram provides evidence of seafloor spreading by showing the ages of ocean floor in the atlantic and eastern pacific oceans.
