Which of the following terrestrial cooled the most rapidly Mercury Venus Earth Mars

Which of the following terrestrial cooled the most rapidly
Mercury
Venus
Earth
Mars

Since Mercury is the smallest, it would cool the fastest. Since the sun constantly heats it, the term 'cooled' is relative. Mercury would have to cool down from a molten ball of slag to a hot rock, so it didn't have that much cooling to do.

And terrestrial planet just means a rocky planet as opposed to a gaseous one. That other guy who answered should really read up on astronomical terminology.

Mars.

Mars doesn't have enough mass to insulate it's liquid outer core to keep it from fractionally crystallizing.

mars it was once said to have water and life but then the tectonic activity stopped and there was no core heat. So mars was the one that cooled off

slydog?? how about dumb mutt??
terrestial means earth,, as in planet terra,,,, it has nothing to do with anyother planets,,,
dumb *** should go to school and actually sit in the classroom,,,

Mars. Mercury still has a molten core.