Oxygen in the air began 3.7 billion years ago . Oxygen appeared when sunlight split water molecules into hydrogen , earths early atmosphere had lots of water vapor , Carbon dioxide , nitrogen, and methane but no oxygen barely . The cause and effects is the Atmosphere which is all of the air surrounding Earth because (Atmo) means air & the other cause and effect is Hydroshpere which is all of the water on Earth (Hydro ) means water .
This is a picture of the life cycle of a star
Earth is protected by a magnetic field and atmosphere, and liquid . The tfirst living CELL on earth began 3.5 billions years ago , The first simple cells were most likely primitive prokaryotic-like cells that's how the life of a cycle started now we are able to have life .
This is a picture of photosyntihesis
As organic compounds such as DNA and proteins develop a new was of obtaining energy evolved and this happened between 3.5 through 3.4 billion years ago
This is a picture of and ozone layer made
The ozone collects in the atmosphere and blocks harmful ultra violet radiation from the sun this happened in 3.4 through 2 billion years ago
This is a picture of oxygen In the atmosphere
Breathable oxygen in the atmosphere began 3.7 through 2.8 billion years ago , oxygen began to accumulate in the atmosphere . This was called " oxygen catasynthesis , at this time Earth became an aerobic planet . The cause and effects are the Atmosphere which contains all the air in Earth's system (Atmo) & the biosphere which contains all the planet's living things (Bio ) .
This is and example / picture of organisms in oxygen in a rich environment
Organisms in oxygen rich environment began 1.8 billion years ago . The organisms that survived and didn't go into extinction developed a use fore oxygen through selluar respiration which also caused an evolution for some organism . Which I a process where cellsc can obtain energy from organic molecules . The cause and effects are the Atmosphere which contains all the air in Earth's system (Atmo) & the biosphere which contains all the planet's living things (Bio ) .
Resources : Google pictures
The End By 🌎💫☄️TRINITY COLLINS 🌎☄️💫