What was first responsible for changing the formerly poisonous atmosphere to an oxygen-rich atmosphere as we have today?

Meteor impacts

Volcanic gases

Earthquakes

Photosynethic bacteria (Cyanobacteria)

Question

Chemistry

Rohan Randolph

11 March, 08:11

What was first responsible for changing the formerly poisonous atmosphere to an oxygen-rich atmosphere as we have today?

Meteor impacts

Volcanic gases

Earthquakes

Photosynethic bacteria (Cyanobacteria)

+5

Answers (1)

Know the Answer?

Tomcat · Answer 1

Photosynthetic Bacteria, They take the carbon dioxide and sunlight and turn it into Glucose and Oxygen, then releases the oxygen because they don't use it.

What was first responsible for changing the formerly poisonous atmosphere to an oxygen-rich atmosphere as we have today?Meteor impactsVolcanic gasesEarthquakesPhotosynethic bacteria (Cyanobacteria)

What was first responsible for changing the formerly poisonous atmosphere to an oxygen-rich atmosphere as we have today?

Meteor impacts

Volcanic gases

Earthquakes

Photosynethic bacteria (Cyanobacteria)