Problemas
moving Wegener was the first scientist who proposed that continents may be moving. What evidence did he use to come to this conclusion? ago? according to Wegener's theory, how was Earth different 250 million years 3. What are tectonic plates? 4. What causes the movement of plates? 5. What is the difference between the lithosphere and asthenosphere? 6. What are convection currents? 7. Where do convection currents occur? 8. Explain the difference between oceanic and continental lithosphere.
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Maribel
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1. Alfred Wegener was the first scientist to propose the theory of continental drift, which suggests that continents may be moving. He used several pieces of evidence to support his theory, including the fit of the coastlines of South America and Africa, the similarity of rock formations and fossils found on different continents, and the presence of ancient glaciation in now-warm regions.2. According to Wegener's theory, Earth was different 250 million years ago because the continents were once joined together in a single landmass called Pangaea. This meant that the climate and geography of the Earth were very different, with vast deserts and high mountains covering much of the land.3. Tectonic plates are large sections of Earth's crust and uppermost layer of the mantle that move and interact with one another. albeit very slowly, due to the movement of molten rock beneath them.4. The movement of tectonic plates is caused by the heat and pressure generated by the Earth's core. This heat causes the molten rock in the mantle to move, which in turn causes the plates to move.5. The lithosphere is the rigid outer layer of the Earth, while the asthenosphere is a semi-fluid layer of the mantle that lies beneath the lithosphere. The lithosphere is broken into tectonic plates, while the asthenosphere is where convection currents occur.6. Convection currents are the movement of heat and matter within a fluid. In the context of Earth's geology, convection currents occur in the asthenosphere and are responsible for the movement of tectonic plates.7. Convection currents occur in the asthenosphere, which is the semi-fluid layer of the mantle beneath the lithosphere.8. The oceanic lithosphere is thinner and denser than the continental lithosphere. The oceanic lithosphere is primarily composed of basalt, while the continental lithosphere is primarily composed of granite. The oceanic lithosphere is also more prone to subduction, or being pushed beneath the continental lithosphere, due to its higher density.