Geology questions
Question Description
I’m working on a geology question and need the explanation and answer to help me learn.
- How did Earth and other planets form? Were planets formed in situ? Or are orbital changes relatively frequent? What determined the different deep layering of the solar planets?
- Was there ever a collision of the Earth with another planet Theia, giving birth to our satellite? There is compelling evidence, such as measures of a shorter duration of the Earthàrotation and lunar month in the past, pointing to a Moon much closer to Earth during the early stages of the Solar System.
- What is the long-term heat balance of Earth? How did its internal temperature decay since it formed by accretion of chondrites? How abundant are radiogenic elements in the interior? Did a ! href=”http://news.discovery.com/space/was-earth-a-migratory-planet-120418.html” rel=”noopener” target=”_blank”>faint young sun%ver warm a îow-ball Earthü/li>
- What made plate tectonics a dominant process only on Earth? How did the planet cool down before plate tectonics?[ref] Was the Earthàcrust formed during the early stages of its evolution or is it the result of a gradual destillation of the mantle that continues today along with crustal recycling? Is the crust still growing or does its recycling compensate for crust formation at mid-ocean ridges and other volcanic areas

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