Sea Floor Spreading Model
Sea floor spreading happens at places where plates are moving away from each other and where the liquid rock from the asthenosphere can come up to the lithosphere.
Sea floor spreading model. The oldest sections should be the sections on both sides furthest from the middle 4. 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. Underneath the hard part of the earth is the asthenosphere the gooey liquid rock that sits underneath the hard outer crust.
The earth does not get bigger. The strips of paper represent oceanic crust or seafloor. A model of seafloor spreading key 1.
Slide the sea floor into the trench as well. Operation of the model slide the sea floor into the three slits in the shoebox and pull it down from underneath so that the numbers 4 are just visible. This is the position the sea floor would have had 4 million years ago.