oxygen
Hydrogen and helium
Oxygen was missing from Earth's early atmosphere. Instead, it mainly consisted of nitrogen, carbon dioxide, and water vapor. Oxygen levels increased over time due to the emergence of photosynthetic organisms.
Scientist study ancient atmosphere by collecting pieces of the early atmosphere that were trapped and formed into rocks and minerals. They take these piece and crush them up to clearly see them and analyze them. Rocks and fossils allow scientist to collect more information of what the atmosphere looked like when they were created.
The early Earth's atmosphere was likely composed of gases like carbon dioxide, water vapor, nitrogen, and minimal oxygen. It was lacking in oxygen compared to the current atmosphere, which is about 21% oxygen. Additionally, early Earth's atmosphere lacked the protective ozone layer present in our atmosphere today.
It came from primitive organisms early in earth's history. They were the first organisms to use photosynthesis to make food, by using light to convert Carbon dioxide and water into glucose (food) and oxygen. Since oxygen is a waste product of photosynthesis, it was released into the air. As more and more of these organisms multiplied, large amounts of oxygen were released into the air, forming today's atmosphere.
Methane gas
Oxygen was the missing thing was.
Oxygen was the important element missing in Earth's early atmosphere. It was only produced later by photosynthetic organisms.
oxygen
nitrogen
oxygen
no
photosynthsis
Hydrogen and helium
Carbon doixide
Oxygen was the element missing from Earth's early atmosphere, which eventually accumulated due to early photosynthetic organisms. This change in the atmosphere allowed for the evolution of organisms that rely on oxygen for respiration.
energy from the sun,lightening,earths heat triggered chemical reaction for the early gases of the earth combined