Activity 2 Magnetic Reversals And Sea Floor Striping Lab

Magnetic striping of the sea floor after mid ocean ridges and trenches were discovered more evidence was discovered that helped to support the theory that the continents had moved around.

Activity 2 magnetic reversals and sea floor striping lab.

Displaying top 8 worksheets found for activity seafloor spreading. Show how dates in hundreds of thousands or millions of years may be assigned to the sea floor stripes by comparison to land based. Midocean ridges and oceanic crust author. Following up the activity.

Demonstrate sea floor spreading. Assuming the distance to the farthest isochron is 300 km the spreading rate of the ridge was. The motion of the earth s molten outer core produces a magnetic field that is characterized by force lines emanating from near the. These surveys revealed a series of invisible magnetic stripes of normal and reversed polarity in the sea floor like that shown in the figure below.

Magnetic reversals and sea floor striping a key factor in establishing the theory of plate tectonics was recognition of past reversals in the earth s magnetic field and the mapping of normal and reverse magnetic striping on the ocean floor. Label the age of each isochron solid line at the bottom of the right hand side of the map using the information recorded on your ocean floor map. Study maps of magnetic anomalies as measured over the oceanic ridges and look for the symmetrical patterns. 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.

Basalt forming at the ridge crest picks up the existing magnetic polarity. These two things were the magnetic striping on the ocean floor and the age of seafloor rocks. Magnetic striping magnetic minerals are found in rocks. 300 km spreading rate.

Distanoe my km. The patterns reflect the creation and spreading of oceanic crust along the mid oceanic ridges.