Sea Floor Spreading Activity

Seafloor spreading theory that oceanic crust forms along submarine mountain zones and spreads out laterally away from them.

Sea floor spreading activity. Alternatively this lesson can be taught after the concept of seafloor spreading so the evidence can be put into context. Most basalt magmas contain abundant molten iron. A model of seafloor spreading purpose. The older rock is close to 400 million years.

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. Displaying top 8 worksheets found for activity seafloor spreading. The purpose of this activity is to make a simple model that shows the evolution of oceanic crust through sea floor spreading. Contents 1 history of study.

Seafloor spreading is a process that occurs at mid ocean ridges where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. Convection currents carry heat from the lower mantle and core to the lithosphere. Convection currents also recycle lithospheric materials back to the mantle. Some of the worksheets for this concept are sea floor spreading work sea floor spreading a model of seafloor spreading inside earth work magnetic reversals activity name date sea floor spreading l 1 2 3 5 4 ovr l lesson 3 seafloor profiling seafloor spreading and subduction.

Model of seafloor spreading templates one with three straight lines and another with striped bands or striped bands with arrows colored pencils or crayons. Mantle convection is the slow churning motion of earth s mantle. Their crystals are pulled into alignment by the earth s magnetic field just like a compass needle is pulled towards magnetic north. Sea floor spreading earth science post module 2 middle school page 3 the youngest rock will always be closest to the ridge area and the oldest will be on the outside closest to the continents.

The mid ocean ridge is where the seafloor spreading occurs in which tectonic plates large slabs of earth s lithosphere split apart. As magma starts to harden into rock iron rich minerals solidify first. This idea played a pivotal role in the development of the theory of plate tectonics which revolutionized geologic thought during the last quarter of the 20th century. This choice is left up to the teacher depending on the reasoning skills of the students.