please help me out with number 1 ,2 ,3, 4, 9, 10, 11, 12, 14 ,21 paleomagnetism
ID: 290792 • Letter: P
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please help me out with number 1 ,2 ,3, 4, 9, 10, 11, 12, 14 ,21
paleomagnetism Pangaea partial melting magnetic reversal magnetic time scale magnetometer mantle plume seafloor spreading slab pull slab suction subduction zone transform fault boundary volcanic island arc ean trench deep-oc divergent ossil magnetism boundary plate tectonics reverse polarity Review Questions il Who is credited with developing the continental drift 9. What are the three major types of plate bounda hypothesis? Describe the relative plate motion at each of these t2What was probably the first evidence that led some to boundaries suspect the continents were once connected? What was Pangaea? 10. What is seafloor spreading? Where is active seafloor spreading occurring today? cut A List the evidence that Wegener and his supporters gath- 11.! What is a subduction zone? With what type of plate boundary is it associated? ered to substantiate the continental drift hypothesis. 5. Explain why the discovery of the fossil remains of 12. Where is lithosphere being consumed? Why must the Mesosaurus in both South America and Africa, but nowhere else, supports the continental drift hypothesis. production and destruction of lithosphere be going on at approximately the same rate? s. Early in this century, what was the prevailing view of 13. Briefly describe how the Himalaya Mountains formed. 14. Differentiate between transform faults and the other two ast expanses of how land animals migrated across v ocean? types of plate boundaries Some predict that California will sink into the ocean. Is this idea consistent with the theory of plate tectonics? 15. Wegener account for the existence of glaciers in th e southern landmasses, while at the same time areas 16. Define the term paleomagnetism 17. How does the continental drift hypothesis account for and Siberia supported lush ndering of Earth's magnetic poles?Explanation / Answer
1) - Continenetal drift theory was propounded by the Geographist ALFRED WAGNER in 1912.
2)- The 1st evidence was the similar fossil remains of the plants and the animals which are available or found along the shores of the different continents such as The fossils of Mesosaurus, a freshwater reptile rather like a small crocodile, found both in Brazil and South Africa, are one example; another is the discovery of fossils of the land reptile Lystrosaurus in rocks of the same age at locations in Africa, India, and Antarctica.
3).Pangea was the large, single supercontinent or the only landmass which is surrounded by the vast single ocean namely Panthalassa, this supercontinent was such a continent which contains all the present continents such as North America. South America, Asia, Australia, Antarctica, Europe, Africa In the mid mesozoic era this supercontinent was brocken and many continents have formed.
4) Four evidences they collected
1). Zig Saw shape of the coastlines- The coastlines of the Southern America and the South Africa if joined then it forms the zig saw lines and completely fits with each other and silmilar is with other continents also.
2). Similarities in the fossil remains of the plants and the animals which are available or found along the shores of the different continents such as The fossils of Mesosaurus, a freshwater reptile rather like a small crocodile, found both in Brazil and South Africa, are one example; another is the discovery of fossils of the land reptile Lystrosaurus in rocks of the same age at locations in Africa, India, and Antarctica.
3). Paleo climatic conditions - The tails of the glaciers have been traced in the Indian subcontinent, Australian continent, antarctican continent and the african continent which seems that these continents were jointed and are having ice covering.
4).Similarities in the ages of rock samples- The samples of the rocks have been taken from the Applachian mountains, New foundland, Greenland, Scottish island, Zolan mountains and the got that the ages of these rocks are same so te assumed that these landmasses were a part of the single supercontinent
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