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Question
describe the process of seafloor spreading and how it supports the theory of plate tectonics.
seafloor spreading occurs when continents break apart, this proves that plate tectonics is false.
seafloor spreading happens at convergent boundaries; this explains why continents drift apart.
seafloor spreading is unrelated to plate tectonics; it is a random occurrence in ocean basins
seafloor spreading occurs at divergent boundaries; as new crust forms and moves away from the mid-ocean ridges, it provides direct evidence for the movement of tectonic plates.
why did alfred wegeners theory of continental drift face skepticism when first proposed, and what evidence eventually supported it?
because he lacked scientific credentials; fossils found in matching positions on different continents
because it contradicted religious beliefs; the existence of subduction zones
because he had no observational data; the color of ocean sediments
because he wasnt a native english speaker; the age of the earths core
For the first question: Seafloor spreading takes place at divergent plate boundaries (mid-ocean ridges), where magma rises to create new oceanic crust that moves outward. This directly demonstrates tectonic plate movement, supporting plate tectonics theory. The other options are incorrect: it does not disprove plate tectonics, does not occur at convergent boundaries, and is not random.
For the second question: Alfred Wegener faced skepticism because he could not explain the mechanism for continental drift (not due to lack of credentials, religious conflict, or language). Fossil evidence of the same species on now-separated continents was key supporting evidence, matching the correct option's details. Other options present false reasons or irrelevant supporting evidence.
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- Seafloor spreading occurs at divergent boundaries; as new crust forms and moves away from the mid-ocean ridges, it provides direct evidence for the movement of tectonic plates.
- Because he lacked scientific credentials; fossils found in matching positions on different continents