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Published byShon Booth Modified over 9 years ago
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Did Pangaea really exist? Click here for Pangaea model
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Now turn to page 226 in your Science textbook With a partner, find the highlighted words in Section 8.4 and try to define them. You can always use the glossary in the textbook.
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What new evidence did scientists find by mapping the ocean floor? -ocean floor not as flat as they thought -there is an underwater mountain range and the trenches run parallel to the ocean edge Mid-ocean ridge
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What new evidence did scientists find by studying the rocks on the ocean floor? -ocean floor was not as old as they thought -young rocks were at the top of the mid-ocean ridge -the farther away from the ridge, the older the rocks
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What new evidence did scientists find by studying Earth’s magnetic fields? - there are magnetic reversals in parallel strips of rock as you move further away from the mid-ocean ridge
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What new evidence did scientists find by studying the locations of earthquakes and volcanoes? - the pattern of volcanoes & earthquakes helped to understand that Earth consists of plates that are continually moving Video on underwater volcanoes
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What question about plate movement are scientists still working on? Video- The Early Earth and Plate Tectonics
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Now turn to the volcano plotting lab!
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