Sea floor spreading
The seafloor - chapter 12 including introduction volcanic mounds on the ocean floor which don't extend above sea level thousands of them associated with hydrothermal vents at spreading centers (monroe fig 12-15, pg 372. A supplement website with materials for mrs barnett dreyfuss' science classes. Inside a flat earth convention, where nearly everyone believes earth isn't round - duration: 7:10 abc news 912,346 views. Seafloor spreading is the continuous process of forming new igneous rock at midocean ridges by injection of magma that forms new seafloor the process is continuous because forces cause opposite sides of the midocean ridge to constantly move apart. Sea-floor spreading lesson plans and worksheets from thousands of teacher-reviewed resources to help you inspire students learning.
In sea-floor spreading, the sea floor spreads apart along both sides of a mid-ocean ridge as new crust is added as a result, the ocean floors move like conveyor belts, carrying the continents along with them. 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 mid- ocean spreading center suggested student grouping: students work as individuals framework integration: themes: patterns of change. This diagram provides evidence of seafloor spreading by showing the ages of ocean floor in the atlantic and eastern pacific oceans the red colors are the youngest parts of the seafloor, where fresh new crust is formed as lava seeps up from the deep interior of the earth at spreading ridges as new. In this experiment, you'll make a seafloor spreading model to learn more about how plate tectonics work and create mid-ocean ridges.
Links to images, maps, and animations : wwwngdcnoaagov/ image shows the age distribution of the ocean floor click image for larger view. 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 resulting in spreading of the sea floor. Looking for seafloor spreading find out information about seafloor spreading theory of lithospheric evolution that holds that the ocean floors are spreading outward from vast underwater ridges first proposed in the early 1960s by explanation of seafloor spreading. Seafloor spreading is a geologic process in which tectonic plates large slabs of earth's lithosphere split apart from each other.
Sea floor spreading
Hess proposes sea-floor spreading 1960 photo: harry hess argues that the continents had once been one, and have drifted apart with the discovery of plate tectonics and the mapping of the earth into about 12 plates, plus the understanding that plates' movement caused earthquakes, alfred wegener. Chapter 1, section 4 evidence for sea-floor spreading several types of evidence supported hess's theory of sea-floor spreading: eruptions of molten material, magnetic stripes in the rock of the ocean floor, and the ages of the rocks themselves.
Find and save ideas about seafloor spreading on pinterest | see more ideas about plate tectonics, earth science activities and earth science. Notes # _____ sea floor spreading mid ocean ridge underwater chain of mountains that extends into all the earth's oceans. 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. Perhaps surprisingly, it was world war ii that gave scientists the tools to find the mechanism for continental drift that had eluded wegener and his colleagues scientists used maps and other data gathered during the war to develop the seafloor spreading hypothesis this hypothesis traces oceanic. Seafloor spreading harry hess seafloor spreading is the process by which new oceanic crust forms along a mid-ocean ridge and older oceanic crust moves away from the ridge.
The sea floor spread the earth's longest mountain chain isn't the andes in south america, or the himalayas in asia, or even north america's rockies. 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. 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 oceans, new oceanic crust is created. Define seafloor spreading seafloor spreading synonyms, seafloor spreading pronunciation, seafloor spreading translation, english dictionary definition of seafloor spreading n a series of processes in which new oceanic lithosphere is created at oceanic ridges. Define sea-floor spreading sea-floor spreading synonyms, sea-floor spreading pronunciation, sea-floor spreading translation, english dictionary definition of sea-floor spreading n in the theory of plate tectonics, the process by which new oceanic crust is formed by the convective upwelling of. Analysis and conclusion 1 describe what happened as you moved the compass over the sea-floor from south america to the ridge and then to africa.