Which of these statements are correct about earths early atmosphere??
Most of the atmosphere in early earth was made up of carbon dioxide, there was nearly no oxygen!
The earths atmosphere has always stayed the same, it has always been made up of mainly oxygen!
The earths atmosphere has always stayed the same, it has always been made up of mainly nitrogen!
The earths atmosphere now is mainly made up of nitrogen!
What was the earths surface originally like??
It was originally like a plane of ice and snow!!
It was originally molten!!
It was the same as it is today!!
What gases do volcanoes give out when they erupt??
carbon dioxide, water vapour and small amounts of other gases!
nitrogen and carbon dioxide!
nitrogen, water vapour, carbon dioxide and small amounts of other gases!
As no one was around in earths early atmosphere, how do scientists give an idea of what it was like??
They guess!!
They travel back in time!!
They evaluate dormant volcanoes that have survived that long!!
They use what the atmospheres of other planets are like, Mars and Venus, today!!
How did the CO2 in earths early atmosphere decrease??
The CO2 dissolved in the oceans that formed!!
It evaporated!!
Marine organisms also took part in increasing the amount of oxygen in the air!!
