WHAT WOULD HAPPEN IF THE EARTH WAS A MOON OF JUPITER?

EACH SOLAR SYSTEM IS HAVING THE CAPACITY TO DEVELOP LIFE, EACH OF THE SOLAR SYSTEM IS HAVING EXCELLENT CAPACITIES TO EVEN DEVELOP SOME SORT OF THE BASIC ORGANIC MATTER AND CHEMISRY TO ALLOW SUCH ANIMALS TO BE EVOLVED ON THE PLANET. EARTH IS THE THIRD PLANET FROM THE STAR CALLED SUN AND ORBITS THE SUN EVERY SUCH 24 HOURS AND 45 MINUTES EACH SOLAR DAY, THIS MEANS THAT IT HAS  THE PERFECT CONDITIONS- FOR LIFE TO EVOLVE, AND NOW THAT, THIS PLANET IS THOUGHT TO BE THE ONNLY KNOWABLE TO HUMANITY TO HARBOUR BILLIONS OF LIFEFORMS ON THIS ROCKY, BUT WHAT IF THE EARTH WAS A MOON OF JUPITER(GAS GIANT PLANET)???
JUPITERS IS PERHAPS A  GAS GIANT MOON IN THE SOLAR SYSTEM THAT IS LOCATED UP IN THE OUTER REGION FROM THE SUN, ITS PERHAPS ABLE TO EVEN CONSUME LOTS OF OBJECT, BUT WHAT IF JUST THE LITTLE BLUE PLANET WAS JUST SCIENTIFICALLY, IMPORTANT FOR THE PLANET LITTLE ONE, THIS IS DRASTIC DECREASE INTO EVERYTHING, THIS MEANS THAT THE PLANET EARTH WOULD BE JUST TIDE LOCKED.

1. THE EARTHS OCEAN WOULD JUST DECREASE THE SURFACE TEMPERATURE OF THE  ATMOSPHERE
2. MAGENTIC FIELD WOULD BE WEAK
3. JUPITERS RADIATION COULD KILL HABITABLE GASES IN THE ATMOSPHERE.
4. RADIATION, WHICH THE EARTH IS GOING TO BE EXPOSED IN, COULD SUFFER GREAT STRIKE THAT WOULD JUST KILL THE TREES...