Sea Floor Spreading Activit

Spreading rates determine if the ridge is fast intermediate or slow.

Sea floor spreading activit.

As magma starts to harden into rock iron rich minerals solidify first. Seafloor spreading and other tectonic activity processes are the result of mantle convection. 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. 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.

Seafloor spreading theory that oceanic crust forms along submarine mountain zones and spreads out laterally away from them. This choice is left up to the teacher depending on the reasoning skills of the students. Seafloor spreading is the movement of magma through a crack in a mid oceanic ridge. Their crystals are pulled into alignment by the earth s magnetic field just like a compass needle is pulled towards magnetic north.

Convection currents carry heat from the lower mantle and core to the lithosphere. 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. Once the basalt cools completely into solid rock the.

Most basalt magmas contain abundant molten iron. Spreading rate is the rate at which an ocean basin widens due to seafloor spreading. Convection currents also recycle lithospheric materials back to the mantle. The mid ocean ridge is where the seafloor spreading occurs in which tectonic plates large slabs of earth s lithosphere split apart.

Alternatively this lesson can be taught after the concept of seafloor spreading so the evidence can be put into context. The rate at which new oceanic lithosphere is added to each tectonic plate on either side of a mid ocean ridge is the spreading half rate and is equal to half of the spreading rate. When a divergent boundary occurs in the ocean seafloor spreading is the result.