Sea Floor Spreading Activity

As magma starts to harden into rock iron rich minerals solidify first.

Sea floor spreading activity.

When taught in series the lessons proceed in much the same way that scientists discovered seafloor spreading and plate tectonics. Their crystals are pulled into alignment by the earth s magnetic field just like a compass needle is pulled towards magnetic north. Seafloor spreading and other tectonic activity processes are the result of mantle convection. The older rock is close to 400 million years.

Convection currents also recycle lithospheric materials back to the mantle. 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. 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. Displaying top 8 worksheets found for activity seafloor spreading.

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. Once the basalt cools completely into solid rock the. Model of seafloor spreading templates one with three straight lines and another with striped bands or striped bands with arrows colored pencils or crayons. 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.

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. This choice is left up to the teacher depending on the reasoning skills of the students. The purpose of this activity is to make a simple model that shows the evolution of oceanic crust through sea floor spreading. Alternatively this lesson can be taught after the concept of seafloor spreading so the evidence can be put into context.

Convection currents carry heat from the lower mantle and core to the lithosphere. Mantle convection is the slow churning motion of earth s mantle. Most basalt magmas contain abundant molten iron. Contents 1 history of study.