How can that possibly be your understanding? Have you heard of embryonic planets? Guess what? They grow.
Yes but in general they do not grow from two like-size bodies accreting, but from a large body gravitationally attracting nearby smaller ones, clearing its orbit. There are occasional exceptions to that, like the Mars'ish sized body many believe crashed into the Earth and causing the formation of the Moon.
What if there is pair production in the core? Wouldn't that increase it's density?
Pair production in the core? As in particles and antiparticles? Unless you mean virtual pair production, it seems unlikely, and even virtual pair production wouldn't be a common occurrence in the core. The notion that particles and anti particles could be created in just the right balance to somehow counterbalance gravitational forces requires a mechanism in quantum gravity that I have never heard proposed.
That's what Tesla thought but he may not have been right. How do you explain the size of the dinosaurs? Brachiosaurus for example or Pterodactyl?
Big animals do not necessarily mean low gravity anty more than big trees do, and there is no evidence that plants were bigger in the past than they are today. The species gave changed, but their sizes are comparable.
In any event how do you explain the birth of a oxygen atmosphere? How did early life forms survive in numbers capable of producing the world supply of oxygen in a landlocked planet with no ozone layer until *after* they supply the oxygen?
How do you explain the nice world-wide banded iron ore formations in sedimentary rocks at just the right places if you assume they rusted out of Precambrian oceans as the oxygen level increased? Since the presence of oxygen renders iron insoluble in water, it makes perfect sense to imagine iron rich seas losing their iron and leaving these formations....what caused an ocean poor Earth to cough up think deposits of iron all at once on a world wisde scale>
For that matter where was all the water. Water is less dense than rock (though I am sire some scientist somewhere disagrees), and would tend to rise. Expanding Earth seems to need water to trickle out from the interior of the Earth (or, one supposes, arrive on comets) at a suspiciously convenient rate...slow at first (where there was no room for oceans) but increasingly fast now that oceans predominate. When the crust was still molten, why was water vapor not shooting out at copious rates?
Then again, why do you believe that scientists get together and drop perfectly good theories in favor of new ones that, according to you are wrong and everyone should know they are wrong? Not even "some" scientists do this, but rather you think scientists do it en masse until the "competing" theory is such a minority position that proponents have to cite the same six people over and over again when making their arguments. Do you think scientists are prone to mass hallucinations, or that they just like to lie? Back in the 50's and 60's when geologists were jettisoning abiotic oil theory and the expanding Earth model, why wasn't the then existing "old guard"preventing them if these theories were good? Why were the new crop of grad students taken in?
For practical purposes, why should I, as a non expert, tell my college geology professor and his vast majority of geologist friends that they are wrong because "some guy on the internets" and the very few sources he could google up disagree?