Arrange the event from Earth's history to indicate the order in which they occured to produce the atmosphere we have today. Start from the earliest event. Events :
Photosynthesizing organisms develop.
The atmosphere becomes mostly water vapor and CO2.
Earth is a molten ball.
The atmosphere becomes mostly nitrogen.
The ancient oceans absorb the CO2 from the atmosphere.
Earth's surface hardens.
Oxygen and nitrogen make up 99 percent of the atmosphere.
Heavy rains fall for thousands of years from oceans.
Volcanoes spew gases from Earth's interior into the atmosphere.
Oxygen slowly builds up in the atmosphere.

Dlive among other english speakers

May consider a group  g=({0,1},+)g=({0,1},+)where  ++  will work as the xor operator like we work in boolean algebra. note here, that ‘00’ and ‘11’ are not the usual 0 and 1 that we work with everyday. the elements are  called  ‘00’ and ‘11’ and  may not mean  zero (nothing) and one (single). ‘00’ is the identity for the given binary operator +, meaning that any element operated with ‘00’ gets us that element itself.  for a set  ss  in  g′g′  having more elements than just  {0,1}{0,1}  the values for  a+b∈sa+b∈s, such that  a∈s,b∈sa∈s,b∈s, have to be first defined, only then can you determine the value of  1+11+1. the answer could possibly have been  22  if oanswer is25,000

Migration people get up and go cause they feel it is best for them