Seafloor Spreading Model
You may wish to cut the paper model pieces for the students ahead of time or use a model you have made as a demonstration for the class.
Seafloor spreading model. Have students pick up materials needed for the activity. Students will make their own models of seafloor spreading and the magnetic strips that occur in the seafloor. The theory of seafloor spreading. This idea played a pivotal role in the development of plate tectonics a theory that revolutionized geologic thought during.
Seafloor spreading theory that oceanic crust forms along submarine mountain zones known collectively as the mid ocean ridge system and spreads out laterally away from them. The oldest sections should be the sections on both sides furthest from the middle 4. The earth does not get bigger. Seafloor spreading ist das langsame seitliche auseinanderweichen spreading des ozeanbodens seafloor an divergenten plattengrenzen als teilprozess der plattentektonik und damit der mantelkonvektion grundlagen und begriffe.
How does seafloor spreading work. What actually is the moho seismic horizon beneath the ocean floor long taken as the boundary between crust and the mantle. In this experiment youre going to model what happens when the ocean floor spreads. The strips of paper represent oceanic crust or seafloor.
Seafloor spreading is a geologic process where there is a gradual addition of new oceanic crust in the ocean floor through a volcanic activity while moving the older rocks away from the mid oceanic ridge. Use the model to show them the creation of new sea floor at spreading centers and the disappearance of old sea floor at subduction zones. What do we really know about seafloor spreading and how ocean crust is generated at the earths mid ocean ridges. The driver for seafloor spreading in plates with active margins is the weight of the cool dense subducting slabs that pull them along or slab pull.
Plate tectonics plate tectonics hesss seafloor spreading model. Die aussere starre hulle der erde die lithosphare besteht aus platten von. After some time in the oven the top of the crust begins to crack and the pieces of the cakes top move away from. Is the ocean crust as simple and regular as the conventional plate tectonics model would have us believe.
Have students work in groups of four. Seafloor spreading is the creation of new seafloor or new oceanic crust 5. Imagine that youre baking a really delicious chocolate cake. The first comprehensive attempt at such an explanation was made by harry h.
A model of seafloor spreading key 1. The existence of these three types of large striking seafloor features demanded a global rather than local tectonic explanation. Hess of the united states in a widely circulated manuscript written in 1960 but not formally published for several. The center slit represents a mid ocean ridge 2.
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