Evidence that sea-floor spreading occurs. They see how transform faults work. Seafloor Spreading Worksheet. Smithsonian Institution. Mid-ocean ridge a continuous mountain chain on the floor of all major ocean basins. 3 (March 1983), p. 22-29. If this idea is correct, alternating stripes of normal and reversed polarity should be arranged symmetrically about. Sea-floor spreading a hypothesis, proposed in the early 1960s, that new ocean floor. Such boundaries are marked by subduction, earthquakes, volcanoes, and.
Seafloor Spreading Worksheet Answer Key
Long edge of the paper. In this plate tectonics worksheet, students complete a sheet of notes about the layer's of the Earth, plate tectonics, continental drift and sea floor spreading. 4) the nature of the Earth's magnetic field and the fact that it has reversed its polarity many. That is, as these iron-rich minerals cool below their Curie point, they become magnetized in. USLegal fulfills industry-leading security and compliance standards. If a plate of oceanic lithosphere collides with thicker and less dense continental lithosphere, the denser oceanic plate will dive beneath the continent in a subduction zone (Fig. Paleomagnetism the permanent magnetization recorded in rocks that allows. You may wish to cut the.
Use the model to show them the creation of new sea floor at spreading. Mechanism is not known. What happens to old oceanic crust as new molten material rises from the mantle 4. A test of the hypothesis of sea-floor spreading was provided by studies of the Earth's magnetism. Wegener used several lines of evidence to support his idea that the continents were once.
Modeling Sea Floor Spreading Answer Key
Double-check the whole document to make certain you have completed all the data and no changes are needed. Periods of reversed polarity alternating with times (like now) of normal polarity. Accredited Business. Model, why do you think that the oldest ocean floor is only about 200 million years old? The pamphlet describes studies of ocean. The process that continually adds new material to the ocean oor is called. 1 Internet-trusted security seal. Fill out Sea Floor Spreading Worksheet Answers in a few moments by using the guidelines below: - Select the document template you require from our collection of legal forms. Start the movement of the ribbons with bands representing normal polarity. Students use Excel to explore the geodynamics Model equation for ocean depth around a sea-floor spreading center. Side Scan Sonar mapping and deep sea drilling. Found at hot-water vents on the ocean floor.
Other popular searches. MATERIALS (Sources given below). A device that scientists use to map the ocean oor is. Fifteen years of marine exploration. Pacific Ocean Floor"; "A Sea-Floor Mystery: Mapping Polarity Reversals"; and "Plotting the. Of ocean floor from the mid-ocean spreading center to the subduction zone. Extensions: Hydrothermal vent systems, called black and white smokers, found at. 5 cm leaving 5 cm on. This worksheet has 3 short answer questions. Differs from geographic north, which corresponds to the planet's axis of rotation. Asthenosphere a portion of the mantle which underlies the lithosphere. Spread the word about seafloor spreading! Some suggested references are given below.
Seafloor Spreading Activity Worksheet
Orders, 2000 Florida Avenue, N. W., Washington, D. C. 20009; phone 1-800-966-2481. Students examine how geologists determine rates of sea floor spreading between two tectonic plates. Was developed by the National Association of Geology Teachers. On each side of the ridge, sea floor moves from the ridge towards the deep-sea trenches, where it is subducted and recycled back into the mantle (Fig. What does this tell you about the lengths of time represented by normal and.
Order from Films for the Humanities &. For each student: 2 sheets of 8. These ridges are spreading centers or divergent plate boundaries where the upwelling of magma from the mantle creates new ocean floor. Discusses mapping of volcanoes, faults, canyons, and lava flows on the ocean floor using a. side-scan sonar device called GLORIA (Geologic Long-Range Inclined Asdic). Ocean floor, they discovered a surprising pattern. Modifications: For younger children, omit explanation of magnetic stripes and. Detect steel-hulled submarines.
Seafloor Spreading Worksheet Answer Key Pdf
United States Geological Survey provides an overview of the methods and equipment that. Spreading and the development of symmetrical magnetic "stripes" on either side of a mid-. Lutz, R. A. and Hessler, R. R., 1983, Life Without Sunlight - Biological Communities of. Sea-floor spreading In the early 1960s, Princeton geologist Harry Hess proposed the hypothesis of sea-floor spreading, in which basaltic magma from the mantle rises to create new ocean floor at mid-ocean ridges. Put the relevant date. About Deep Sea Hydrothermal Systems: Ballard, R. D. and Grassle, J. F., 1979, Incredible World of the Deep-sea Rifts: National. SPREADING TEACHER'S GUIDE.
PURPOSE: The purpose of this activity is to make a simple model that shows the. Slides: "Undersea Exploration" ($16. Volcanoes are concentrated at the boundaries between lithospheric plates. Other CEEP modules related to the ocean floor include: "Lithospheric Plates and Ocean.
Sea Floor Spreading Worksheet Answer Key West
They complete an introductory tutorial on Excel for students with no prior Excel experience. 4) Draw a third vertical line to the left of the center line so that it lies 3 cm from the left edge of the paper. Ve finished imputing information. They describe the processes involved in creating new seafloor at a mid-ocean ridge.
The age of the sea-floor also supports sea-floor spreading. Follow the simple instructions below: Experience all the key benefits of submitting and completing documents on the internet. Technology made exploration of the ocean floor possible. Basaltic lavas contain iron-bearing minerals such as magnetite which act like compasses.
Before performing this activity, students should be familiar with: 1) types of boundaries between lithospheric plates; 2) features of the ocean floor; 3) the concept of sea-floor spreading; and. Answer the questions on a separate sheet of paper. Continental drift The idea that continents move is an old one; Alfred Wegener, a German meteorologist, proposed the hypothesis of continental drift.