this, don't have any direct meaning. elaborate it! and definetly earth is present.
Oxygen is believed not to be present at the time of Earth's formation.
because if we count the earth it is the largest thing pass or present
life
yes
life
Science is present on the earth through the method of observation ,documentation and testing of a hypothesis, in controlled and repeatable experimentation.
its the earth it self
Ozone is present in the stratosphere of the earth's atmosphere. It is also present in the troposphere.
Oxyegen
BACTERIA
Poles
No, rocks that are 3.5 billion years were not present when earth was first formed. Earth formed about 4.6 billion years ago.