In our solar system;why are the outer planets bigger and inner planets smaller?

Before a newly-formed star reaches a stable equilibrium, it goes through a "T-Tauri" phase of producing an intense solar wind. (T-Tauri is named after the first star of this type discovered). In our solar system, this phase likely occurred while the planets were still forming from random debris.

This would have pushed the lighter elements such as hydrogen and helium out of the inner solar system, leaving only heavier elements and rocks. The outer solar system was far enough from the sun for the solar winds to have no effect on the lighter elements, allowing them to form planets. This theory seems to conflict with discoveries of extrasolar planets called "hot Jupiters".

That is, large gas planets which are very close to their parent star. In this case it is theorized that they actually formed farther out, but orbital instabilities drew them closer over time.

The current hypothesis by planetary geologists is that gas giants that are close to their suns moved there AFTER they formed because of gravitational interactions with other massive bodies which changed their orbits. Some of those gas giants are losing their atmospheres because the solar wind from their star is stripping the atmosphere off. Gas giants DO have liquid or solid surfaces and liquid outer cores of nickel and iron, probably with a significant percentage of sulfur as well.

(Sulfur lowers the melting point of a nickel-iron alloy.) because they ALL have strong magnetospheres and high magnetic dipole moments. Relatively rapid rotation is also required for a magnetosphere to form. Even though Venus has a molten outer core, it rotates so slowly that its magnetic field is barely detectable at this time.

Mar's has remnant magnetic fields, but it's outer core has probably largely crystallized over time. Mars doesn't have enough mass to insulate the liquid core from cooling off and crystallizing over billions of years even though Mars does have relatively rapid rotation.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.