0
After the earth was created, there was just one gigantic ocean. At some point, single-celled organisms formed - the first plants. They made their own energy using the sun and carbon doixide (photosynthesis) and one of the waste products was oxygen. As they multiplied, more and more oxygen was produced, forming the start of today's atmosphere.
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoOxygen is a direct result of life on earth, and photosynthesis didn't start until about 3 billion years ago
Add your answer:
Earn +20 pts
What change occurred in Earth's atmosphere after the evolution of photosynthesizing prokaryotes?
The rapid rise of atmospheric oxygen illustrated in the geological record by layers of iron oxides.
When did the water level start rising?
if an oak tree uses 50gallons (200ltrs) of water per day, how does the deforestation of saouth America and Burma, for teak wood affect the rising water table of the planet. All the water must still be on the planet, this was fresh water, now transmitted to the atmosphere. This may raise the water table and cause salination. Is that feasible
When elevation increases oxygen content?
The following changes are average changes, which means there might be exceptions more or less as we rise upward. But in general as elevation increases, on average: Temperature decreases Atm pressure decreases Wind velocity increases Gamma radiation increases Overhead turns black More and more stars are seen Shape of the planet as a sphere becomes obvious
What were the results of the experiment in which a bottle of oxygen was placed over of air?
One bottle would have more pure oxygen then the other one, since oxygen is more dense then air, and will not rise into the atmosphere or combine with air quick
Ions Trapped in the Earth's magnetic field give rise to?
ultraviolet radiation
What change occurred in Earth's atmosphere after the evolution of photosynthesizing prokaryotes?
The rapid rise of atmospheric oxygen illustrated in the geological record by layers of iron oxides.
How are oxygen in the air levels affected by energy production?
Oxygen in the air levels are affected by energy production greatly, due to the way that oxygen moves. Oxygen can take over many other components, which can cause air levels to rise.
Is the rainforest important?
Yes, because without the many trees in the rainforest, the Earth's CO2 levels will rise and O2 levels will fall. Also, there are many undiscovered plants in the rain forests of earth that could help humans.
What happens to the blood concentration level of carbon dioxide following increased breathing?
With increased breathing, levels of carbon dioxide in the blood drop and levels of oxygen rise.
How does heat effect the earth?
The warmth heats up the icebergs in the sea. this causes sea levels to rise....
What would happen if the earth gets 4 degrees hotter?
sea levels will rise due to melted glaciers
What happens if calcitonin levels rise?
Osteoclasts activity is inhibited and blood calcium levels rise.
What are two things caused by the interaction of the movements of the Earth and moon?
The rise and fall of sea levels are affected very much depending on the type of movements of the earth and the moon.
What inflammable gas mixes with oxygen to form water?
Oxygen is actually a part of Water. The formula of Water is H2O or Hydrogen2(2 atoms) Oxygen. So since oxygen is part of water, if the Earth had no more oxygen, we could get it from water, but water would evaporate because there is no oxygen. But since Oxygen is lighter that Hydrogen, if it's not mixed, it will rise, rise to the surface.
What do you call the abnormal rise of the Earth's temperature?
The observed increase in Earth temperatures is referred to as "global warming" and is blamed on increased levels of carbon dioxide and other gases. The rise is now addressed by the less-specific term "climate change".
How does sea level rise?
Sea levels rise with the tides.
What is the facts about island?
There are over 100,000 islands on Earth. Many are tropical and many are covered with ice. A number of islands on Earth changes quickly due to the rise and fall of the sea levels. Sea levels that are high mean smaller islands disappear.
