If the Earth doubled in size, trees would immediately fall over. This is because surface gravity would be doubled. It would also mean dog-size and larger animals would not be able to run without breaking a leg.
100 Mind-Blowing Doubled Facts
If the Earth doubled in size, then all trees would topple over. This is a direct result of changes in surface gravity.
If you started with $0.01 and doubled your money every day, it would take 27 days to become a millionaire.