Early Earth probably had an atmosphere dominated by carbon dioxide similar to the atmosphere of Venus today.
# There are a group of one-celled organisms that can live in an oxygen free environment. These are the bacteria or prokaryotes. They do not have a nucleus and reproduce only by cell division. These creatures are the earliest evidence of life on earth. They were the first organisms to develop photosynthesis. Photosynthesis today is balanced by oxygen using respiration.
1. Hypothesis: Oxygen was nearly absent in the atmosphere of early Earth so photosynthesis would have created a net gain of oxygen first in the ocean and later in the atmosphere. Eventually with sufficient oxygen in the atmosphere respiration would have balanced photosynthesis except when burial removed the organic material from the oxygenated water or air. Before oxygen could build up in the atmosphere it must have oxidized reduced ions in seawater.
The most ancient bacteria forms (archaeobacteria) can use the chemical energy in hydrogen sulfide or other inorganic molecules to provide that energy (chemosynthetic). Fossil evidence shows that cyanobacteria
have existed on Earth for about 3 billion years. Cyanobacteria were able to use the electromagnetic energy of light to manufacture organic molecules through the process known as photosynthesis. The organic molecules contained chemical energy the cyanobacteria could use. The oxygen gas that was produced is poisonous to many of the anaerobic bacteria.
Early Earth probably had an atmosphere dominated by carbon dioxide similar to the atmosphere of Venus today.
# There are a group of one-celled organisms that can live in an oxygen free environment. These are the bacteria or prokaryotes. They do not have a nucleus and reproduce only by cell division. These creatures are the earliest evidence of life on earth. They were the first organisms to develop photosynthesis. Photosynthesis today is balanced by oxygen using respiration.
1. Hypothesis: Oxygen was nearly absent in the atmosphere of early Earth so photosynthesis would have created a net gain of oxygen first in the ocean and later in the atmosphere. Eventually with sufficient oxygen in the atmosphere respiration would have balanced photosynthesis except when burial removed the organic material from the oxygenated water or air. Before oxygen could build up in the atmosphere it must have oxidized reduced ions in seawater.
The most ancient bacteria forms (archaeobacteria) can use the chemical energy in hydrogen sulfide or other inorganic molecules to provide that energy (chemosynthetic). Fossil evidence shows that cyanobacteria
have existed on Earth for about 3 billion years. Cyanobacteria were able to use the electromagnetic energy of light to manufacture organic molecules through the process known as photosynthesis. The organic molecules contained chemical energy the cyanobacteria could use. The oxygen gas that was produced is poisonous to many of the anaerobic bacteria.
because over 3 billion years ago there was not much oxygen and there was not very much bacteria in the oxygen so now there is lots
nitrogen is the most common element in the earths atmosphere
i do nt no
by the earth's energy being reflected to the atmosphere
no
The Stratosphere
Earth's early atmosphere was primarily composed of carbon dioxide. Early bacteria used carbon dioxide as a source of fuel and as a result produced oxygen.
cuz they can
it will always change
Earths atmosphere has changed in a few ways. It contains more pollutants and carbon dioxide which is a greenhouse gas.
it will rise
The earths atmophere came from your mom!
The appearance of photosynthetic organisms
The eruption of a very large volcano
The origin of free oxygen
more oxygen was consumed
Scientist theorize that bacteria with chlorophyll in them slowly but surely began to multiply. And as they did, they photosynthesized enough to create an entire atmosphere. (as you know oxygen is a byproduct of photosynthesis)
The particles outside the Earths atmosphere are called, meteoroids.