lets say we colonized mars?

Probably.

A Mars colony would be heavily dependent upon Earth for many resources. The same can be said of the moon as well.

But in Mars' case - the colony could become significantly self-sufficient, in fact producing it's own materials and food and such. But dome-grown food would be more expensive initially. Eventually, after basic agriculture becomes viable in certain domed environments, we can start to remediate the planet itself.

Sometime beforehand, certainly after agriculture becomes established, colonists might rightfully reject having administrations and colonial governors and multi-planetary corporations, so eventually, these operations might be "nationalized" by the local populations.

Colony : wiki/Colonization_of_Mars

Mars Image : http://www.pinktentacle.com/images/mars_2057.jpg

You could EVEN see nation-states develop on Mars itself. While it might not seem natural or necessary. If there were two or three major colony cities on Mars, each founded or having a predominant nationality, US, Russian, Chinese, European, these cities would certainly have some cultural resonance from their old sponsor nations on Earth which could either change or merge but could become distinct enough that they declare nationhood.

By that time, we will definitely know if there is/was life on Mars. If it's more or less a planet that appears lifeless, we might be in the position to terraform the planet, by using CFC's and other factory outputs which are considered pollution on Earth, Mars' atmosphere could be made significantly warmer this would allow the poles to melt a bit allow the atmopheric pressure to rise.

Allowing more heat, and you could get a sort of low-grade greenhouse effect. At this point you still have to deal with low atmospheric density by smashing comets and small ice/asteroids from the main asteroid belt into Mars.

Through decades if not hundreds of years, Mars would both develop a thicker atmosphere as well as small seas, leading to a large planet spanning southern ocean.

http://www.cds.caltech.edu/~shane/images/mars_terr...

If we persevere in this endeavour , Mars could be as green and vibrant a planet as Earth eventually, but it would take quadrillions of dollars and centuries to bring the planet to a state we might consider habitable.

http://www.popsci.com/node/8104/

Most of Mars will probably NEVER be a lush paradise, but more like a high-desert country - maybe like the badlands of Montana or Wyoming the Russian Steppe. Some warm more wet low-lying areas might be more like Arizona or some places. But unless we truely deluged the planet with water, it would always seem relatively dry to our oceanic world.

Eventually, yes. Like others said, at first the martian colonies would be very dependent on Earth for supplies, especially entertainment. Once the martian colonies are self supporting physically they could dare rebel against Earth.

it would depend on whether or not the founders were an international group or a single nation(probably to expensive for 1 nation to do by itself)and whether or not a Earth based group tried to dictate terms to them(hard to do when Mars is that far away)Also if it was international corporations that set up the colony or not And wether or not independence was in the founding members original plans or not

Not sure what an "earthen" is - its usually a word meaning something made of earth and clay (such as earthen jug or earthen dwelling).

If there are Martians (and of course there is no evidence of any kind to suggest they exist), then I'm sure they would fight back - wouldn't you if someone tried to invade Earth?

if by martians you mean earthlings that colonized mars; no they wouldnt rebel because they would be dependant on Earth. (Keep in mind plants dont grow on mars and there is no liquid water)

I dunno about everyone else but i would live some place very remote, separated from the colonies by a large amount of distance, so even if they did rebel against earth i wouldn't have anything to do with it, i would just be some crazy old prospector hermit minding my own business.

some researchers propose that we'd desire to concentration on construction the area elevator first, because of the fact mutually as rockets fee 15000 funds in line with pound of fabric, area elevator can fee in basic terms a pair of million-15 funds in line with 10 pounds, so after the area elevator project is end in line with risk NASA might concentration on Mars colonisation, definite it incredibly is somewhat conceivable!

we would be called immigrants and would need a green martian card to stay or we would be asked to retun to earth...or be sent the a penal colony on krypton

Solar system war. Fun

I think they would follow rules, because they would need essential supplies from here.