How to make a bigger planet be as similar to Earth as possible

My fantasy world is slightly larger than earth so that discovery of the continents becomes harder (about 20% surface should do it). But at the same time I want to preserve most aspects to make it like the earth, it has a moon, similar animal species, similar climate, four seasons, temperatures ranging from 50C to -60 or so, magnetic field etc. Also similar proportion of minerals in the crust. To achieve this I thought of making the planet spin faster and it's tilt angle to be slightly lesser. Would that work?

How would the increased weight come into play? Would density of the inner mantles be important to preserve or could we make them more porous so to keep 1G without much changes in the surface? Would we still have the same tectonic activity or should we change the nature or thickness of the crust? Would the climate change a lot or the scale of the cyclon/anticyclone system would remain the same? Should I make the atmosfhere lighter?

Any other solutions will be welcomed. I found this post very useful.

posted almost 6 years ago

Tomás‭

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