Sea floor spreading
Seafloor spreading model activity the ocean floor or oceanic crust is made of igneous rocks that form when magma wells up from earth’s hot interior through mid. A dynamic principle of geology was explained with harry hess' discovery of sea floor spreading. K-12_geology sitemap home k-12_geology the distance between us and them: sea floor spreading in the atlantic ocean. Sea-floor spreading is the process in which the ocean floor is extended when two plates move apart plates are huge slabs into which the crust as well as the upper. A model of seafloor spreading purpose: the purpose of this activity is to make a simple model that shows the evolution of oceanic crust through sea-floor spreading.
Purpose: students will make a paper model illustrating the concept of sea-floor spreading and the development of symmetrical magnetic stripes on either side of a. Sea-floor spreading:divergent boundaries - duration: 4:06 hcs 5th & 6th grade science 6,553 views 4:06 plate tectonics: seafloor spreading. Harry hammond hess (may 24, 1906 – august 25, 1969) was a geologist and a united states navy officer in world war ii considered one of the founding fathers of. History of oceanography click on the arrows below to learn more continental drift and seafloor spreading the keys to modern earth.
Continental drift, sea floor spreading and plate tectonics pdf - download as pdf file (pdf), text file (txt) or view presentation slides online upsc. Sea-floor spreading sea-floor spreading is what happens at the mid-oceanic ridge where a divergent boundary is causing two plates to move away from one another. Find and save ideas about seafloor spreading on pinterest | see more ideas about plate tectonics, earth science activities and earth science.
23 sea-floor spreading during and just after world war ii, the technological improvement to submarines led to an improvement in underwater navigation and surveying. On this section of the seafloor, the history of earth's magnetic field that is revealed includes the following periods: brunhes normal - present time to 730 thousand. In this introductory excel tutorial (activity i) students use excel to explore the geodynamics model equation for ocean depth around a sea-floor spreading center for.
Scientists found very little sediment on the ocean floor the thinnest (least) sediment was found around the mid-ocean ridges, and the thickest sediment was found. Introduction mid-ocean ridge - an undersea mountain chain where new ocean floor is produced magma erupts through the mid-ocean ridge as lava it cools and hardens. Convection currents/sea floor spreading presentation where does convection occur it occurs inside the mantle of the earth or the ashenosphere which scientist(s.
As defined by the textbook, seafloor spreading is the mechanism that operates along the oceanic ridge system to create new seafloors the average speed of seafloor.
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. Define seafloor spreading: the divergence at mid-ocean ridges of the tectonic plates underlying the oceans that is due to upwelling from the earth's. A secondary school revision resource for ocr gcse 21st century science about the earth, space, plate tectonics and continental drift. Seafloor spreading: seafloor spreading, theory that oceanic crust forms along submarine mountain zones and spreads out laterally away from them.
Seafloor spreading happens at the bottom of an ocean as tectonic plates move apart the seafloor moves and carries continents with it at ridges in the middle of. According to the national oceanographic and atmospheric administration, seafloor spreading is caused by the flow of plastic mantle rock beneath the earth's oceanic crust. The best videos and questions to learn about seafloor spreading get smarter on socratic. Start studying 3 pieces of evidence supporting sea floor spreading learn vocabulary, terms, and more with flashcards, games, and other study tools. Posts about sea floor spreading written by hakonhallgrimur.