If Earth had twice as much oxygen as it does, fires would start easier and burn hotter. Arthropods (insects, Spiders and the like) could be a good deal larger than they are now.
the earth would die
Some Bacteria do not need and will even die in the presence of oxygen. They would thrive and probably evolve.
most plants and animals would die due to the lack of food and oxygen
We would all die. As there won't be enough oxygen for us to breathe in.
there would be no oxygen on earth.
the earth would die
we would be dead
i will be twice as heavy
If the sun exploded it would not give us oxygen; it would simply vaporize Earth.
if it was twice as massive, earth probably have burned, noone would be here, and surviving would be a 1 out of 100,000
all human and animal activity would die
Actually I dont know, but I guess the rate of everything happeningnow would be twice as fast.
Some Bacteria do not need and will even die in the presence of oxygen. They would thrive and probably evolve.
most plants and animals would die due to the lack of food and oxygen
we well not get oxygen and all earth get die
Humans would die, because plants make our oxygen
Double