7.1.2 Study: The Mantle and Crust
... Use the spaces below to take notes on the key concepts presented in this study. Main Idea #1: Scientists can collect information on the surface of Earth that gives them a hint as to what is below the surface. ...
... Use the spaces below to take notes on the key concepts presented in this study. Main Idea #1: Scientists can collect information on the surface of Earth that gives them a hint as to what is below the surface. ...
astron_ch_7c (1)
... In these cases, the mantle material wells up forming ridges (Mid-Atlantic Ridge). ...
... In these cases, the mantle material wells up forming ridges (Mid-Atlantic Ridge). ...
Jigsaw Puzzle Earth
... are located through the center of the ridges. Scientists noticed two amazing observations about the MidAtlantic Ridge. They noticed that thinner sediment is found on the sea floor closer to the ridge than the sediment on the floor as you move away from the ridge. Based on this observation, sediment ...
... are located through the center of the ridges. Scientists noticed two amazing observations about the MidAtlantic Ridge. They noticed that thinner sediment is found on the sea floor closer to the ridge than the sediment on the floor as you move away from the ridge. Based on this observation, sediment ...
Plate Tectonics: Have the Continents Really Moved Apart?
... magnetic ‘tape-recording’ of reversals (Figure 4). A zebrastripe pattern of linear magnetic anomalies parallel to the mid-ocean ridge crest has been recorded in many areas, while potassium-argon dating has been claimed to show older rocks are farther from the ridge crest. ...
... magnetic ‘tape-recording’ of reversals (Figure 4). A zebrastripe pattern of linear magnetic anomalies parallel to the mid-ocean ridge crest has been recorded in many areas, while potassium-argon dating has been claimed to show older rocks are farther from the ridge crest. ...
Ch. 1 Jeopardy
... that circle the Earth like the seams of a baseball. They are also formed from divergent boundaries. ...
... that circle the Earth like the seams of a baseball. They are also formed from divergent boundaries. ...
5-Continental Drift and Plate Tectonics
... community ridicule the concept that would revolutionize the earth sciences and scorn Alfred Wegener who dared to propose it. Most of the attacks were aimed at Wegener himself, an outsider who seemed to be attacking the very foundations of geology. Because of this abuse, Wegener could not get a profe ...
... community ridicule the concept that would revolutionize the earth sciences and scorn Alfred Wegener who dared to propose it. Most of the attacks were aimed at Wegener himself, an outsider who seemed to be attacking the very foundations of geology. Because of this abuse, Wegener could not get a profe ...
Plate Tectonics - Londonderry School District
... by Hess & Deitz In the late 1950's, scientists mapped the present-day magnetic field generated by rocks on the floor of the Pacific Ocean. The volcanic rocks which make up the sea floor have magnetization because, as they cool, magnetic minerals within the rock align to the Earth's magnetic field. T ...
... by Hess & Deitz In the late 1950's, scientists mapped the present-day magnetic field generated by rocks on the floor of the Pacific Ocean. The volcanic rocks which make up the sea floor have magnetization because, as they cool, magnetic minerals within the rock align to the Earth's magnetic field. T ...
Plate Tectonics Crossword
... Alfred _______ is credited with developing the theory of continental drift. ...
... Alfred _______ is credited with developing the theory of continental drift. ...
plate tectonics review - Hicksville Public Schools
... 8. Why was the theory of continental drift rejected at first? ...
... 8. Why was the theory of continental drift rejected at first? ...
Plate Tectonics - Net Start Class
... c. Gondwanaland- continent in the southern hemisphere which includes Australia, Antarctica, India, Africa and South America d. Ocean surrounding Pangaea was called Panthalassa e. Pangaea split 200-225 million years ago ...
... c. Gondwanaland- continent in the southern hemisphere which includes Australia, Antarctica, India, Africa and South America d. Ocean surrounding Pangaea was called Panthalassa e. Pangaea split 200-225 million years ago ...
The Earth`s B-Field
... Earth’s B-Field Earth's magnetic field is approximately a magnetic dipole, with the magnetic field S pole near the Earth's geographic north pole and the other magnetic field N pole near the Earth's geographic south pole. An imaginary line joining the magnetic poles would be inclined by approximatel ...
... Earth’s B-Field Earth's magnetic field is approximately a magnetic dipole, with the magnetic field S pole near the Earth's geographic north pole and the other magnetic field N pole near the Earth's geographic south pole. An imaginary line joining the magnetic poles would be inclined by approximatel ...
Lecture Notes
... too slow to search the ocean for hiding subs -fly over ocean in planes over 100mph – much better for sub hunting in a huge ocean but can’t use sonar from planes - so magnetometers - basically very sensitive compasses • ...
... too slow to search the ocean for hiding subs -fly over ocean in planes over 100mph – much better for sub hunting in a huge ocean but can’t use sonar from planes - so magnetometers - basically very sensitive compasses • ...
Interior Earth vocabulary.xlsx
... A boundary along which a plate carrying oceanic crust sinks beneath a plate with continental crust. A boundary along which a plate carrying oceanic crust sinks beneath a plate with oceanic crust. A layer of molten metal, mainly nickle and iron, that surrounds Earth's inner core. A hypothetical super ...
... A boundary along which a plate carrying oceanic crust sinks beneath a plate with continental crust. A boundary along which a plate carrying oceanic crust sinks beneath a plate with oceanic crust. A layer of molten metal, mainly nickle and iron, that surrounds Earth's inner core. A hypothetical super ...
Sea Floor Spreading
... Soon, scientists observed a large mountain chain running down the center of the Atlantic ocean. ...
... Soon, scientists observed a large mountain chain running down the center of the Atlantic ocean. ...
File - South Sevier High School
... that Earth’s plates move is called ________________ _________________________. 2. ___________________ geologic activity is concentrated at plate boundaries, where plates move away, toward, or past each other. 3. In the early 1900’s, Alfred _____________________ hypothesized that Earth’s crustal plat ...
... that Earth’s plates move is called ________________ _________________________. 2. ___________________ geologic activity is concentrated at plate boundaries, where plates move away, toward, or past each other. 3. In the early 1900’s, Alfred _____________________ hypothesized that Earth’s crustal plat ...
Magnetic Evidence for Seafloor Spreading Quiz
... 6) True or false. The Matuyama reverse was 2.48 to 3.4 million years ago. a) True b) False 7) What is not true about the magnetic stripes on the ocean floor? a) Stripes alternate across the ocean floor. b) Stripes mirror each other on either side of the mid-ocean ridge c) Stripes do not alternate a ...
... 6) True or false. The Matuyama reverse was 2.48 to 3.4 million years ago. a) True b) False 7) What is not true about the magnetic stripes on the ocean floor? a) Stripes alternate across the ocean floor. b) Stripes mirror each other on either side of the mid-ocean ridge c) Stripes do not alternate a ...
convection-and-the-mantel-1st-one-of-week-5
... – in South Africa there are places where glaciers have been proven to have existed in the past. But the climate now in South Africa the climate is much to warm and mild. ...
... – in South Africa there are places where glaciers have been proven to have existed in the past. But the climate now in South Africa the climate is much to warm and mild. ...
7-2 Science notebook answers
... mid-ocean ridge in the middle. Parallel bands of alternating polarity should be mirrored on both sides of the ridge. ...
... mid-ocean ridge in the middle. Parallel bands of alternating polarity should be mirrored on both sides of the ridge. ...
Earth`s Lithosphere Study Guide
... suggests continents in polar areas were once near the equator • glacial deposits are found in tropical areas suggests some continents now in tropical areas were once near the poles No possible force could move something as large as a continent. ...
... suggests continents in polar areas were once near the equator • glacial deposits are found in tropical areas suggests some continents now in tropical areas were once near the poles No possible force could move something as large as a continent. ...
Sea-Floor Spreading - Zion Central Middle School
... New ocean floor forms along cracks in the ocean crust as molten material erupts from the mantle spreading out and pushing older rocks to the sides of the crack. New ocean floor is continually added by the process of sea-floor spreading. ...
... New ocean floor forms along cracks in the ocean crust as molten material erupts from the mantle spreading out and pushing older rocks to the sides of the crack. New ocean floor is continually added by the process of sea-floor spreading. ...
Plate Tectonics - The Naked Science Society
... (1) continents can move across the surface of the globe (2) patterns of volcanism can change and shift across the globe as plates and their boundaries evolve and move (3) new oceans may grow (4) oceans basins close and are deformed to produce mountains ...
... (1) continents can move across the surface of the globe (2) patterns of volcanism can change and shift across the globe as plates and their boundaries evolve and move (3) new oceans may grow (4) oceans basins close and are deformed to produce mountains ...
Unit 1A Assessment Review
... -rift valley (mid ocean ridge) -transform boundary -asthenosphere -magnetic reversals -divergent boundary -subduction -Pangaea -convergent boundary -volcanism -hotspots -Alfred Wegener -continental drift -plate tectonics -convection - ocean trench Reflection Questions: Use chapter 1 A to answer the ...
... -rift valley (mid ocean ridge) -transform boundary -asthenosphere -magnetic reversals -divergent boundary -subduction -Pangaea -convergent boundary -volcanism -hotspots -Alfred Wegener -continental drift -plate tectonics -convection - ocean trench Reflection Questions: Use chapter 1 A to answer the ...
Lecture 2 The Earth. I. The Interior Earth – vital statistics Planet size
... Presume planets with strong magnetic field have an internal dynamo converting the kinetic energy of a conducting, moving fluid into magnetic energy. ⇒ Strong evidence for molten material inside Earth ...
... Presume planets with strong magnetic field have an internal dynamo converting the kinetic energy of a conducting, moving fluid into magnetic energy. ⇒ Strong evidence for molten material inside Earth ...
Convergent boundary
... Earth is probably not built of uniform layers, it is likely mixed somewhat by convection ...
... Earth is probably not built of uniform layers, it is likely mixed somewhat by convection ...
Geomagnetic reversal
A geomagnetic reversal is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged. The Earth's field has alternated between periods of normal polarity, in which the direction of the field was the same as the present direction, and reverse polarity, in which the field was the opposite. These periods are called chrons. The time spans of chrons are randomly distributed with most being between 0.1 and 1 million years with an average of 450,000 years. Most reversals are estimated to take between 1,000 and 10,000 years.The latest one, the Brunhes–Matuyama reversal, occurred 780,000 years ago;and may have happened very quickly, within a human lifetime. A brief complete reversal, known as the Laschamp event, occurred only 41,000 years ago during the last glacial period. That reversal lasted only about 440 years with the actual change of polarity lasting around 250 years. During this change the strength of the magnetic field dropped to 5% of its present strength. Brief disruptions that do not result in reversal are called geomagnetic excursions.