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Free oxygen did not occur on Earth until primitive plants known as stromatolites and green algae appeared.
Like all green plants, they used photosynthesis to convert carbon dioxide and water into hydrocarbon and free oxygen.
With the production of free oxygen, an ozone layer formed in the upper atmosphere.
*There were a lot of stromatolites.
Since the ozone layer acts like a filter to reduce the amount of ultraviolet radiation reaching the Earth's surface, the Earth's lands and oceans became able to support life.
What else can I help you with?
How can a small increase of carbon dioxde level in the atmosphere affect earths trmperature?
if carbon dioxide increases too much it may release another gas called methane, which will reduce the atmosphere and damage the planet.
What is the atmosphere made of on Venus?
It is mostly carbon dioxide, 97 %, at a pressure 90 times that of earth's atmosphere at sea level.
Carbon dioxide is kept at a constant level by an exchange between the atmosphere and?
Carbon dioxide is kept at a constant level by an exchange between the atmosphere and various sinks, such as oceans, plants, and soil. These sinks absorb and store carbon dioxide, helping to regulate levels in the atmosphere. The balance between carbon dioxide sources, such as human activities and natural processes, and sinks maintains equilibrium in the carbon cycle.
How does the process of photosynthesis affect carbon dioxide concentrations in the atmosphere during a typical year?
Photosynthesis uses carbon dioxide as a raw material where carbon dioxide is fixed into organic molecules. This process lowers the level of carbon dioxide in the atmosphere. The seasonal fluctuation of carbon dioxide levels during a year may be caused by increased photosynthesis during spring and summer.
Humans have greatly increased the level of what in the atmosphere?
Humans have greatly increased the level of carbon dioxide in the atmosphere. This is primarily due to the burning of fossil fuels for energy production, transportation, and industrial activities. This increase in carbon dioxide is a major contributor to global warming and climate change.
Why does the carbon dioxide level fluctuate during a single year?
The carbon dioxide level fluctuates during a single year due to seasonal changes in plant growth and decay, which affect the amount of carbon dioxide absorbed and released into the atmosphere.
What is the current carbon dioxide level in the atmosphere of Bangladesh?
Carbon dioxide (CO2) is a gas that mixes very easily, so there are no regional variations. So the carbon dioxide level in Bangladesh is the same as it is all round the world.The carbon dioxide levels for 2012 are 392 ppm (parts per million).
Is it true or false that the carbon dioxide level in the atmosphere has been increasing since 1900?
True. The carbon dioxide level in the Earth's atmosphere has been increasing since around 1900 due to human activities such as burning fossil fuels and deforestation. This increase in carbon dioxide is a major contributor to global warming and climate change.
How does respiration affect the amount of carbon dioxide in the atmosphere?
Respiration, breathing, has no effect on the amount of carbon dioxide in the atmosphere. This is part of the natural carbon cycle. Burning fossil fuels (coal, oil and natural gas) releases carbon dioxide that has been hidden away for millions of years. This extra gas is increasing in the atmosphere.
Humans have greatly increased the level of in the atmosphere.?
carbon dioxide
What the consequences of this carbon dioxide blanket settling in the earths atmosphere?
The consequences of increased carbon dioxide in the atmosphere include global warming, leading to rising temperatures, sea level rise, melting ice caps, more extreme weather events, and disrupted ecosystems. This can have severe impacts on agriculture, water availability, and human health.
What was the Carbon dioxide level in 1993?
Carbon dioxide levels in the atmosphere in 1993 were around 360 ppm (parts per million). Levels now (2013) are approaching 400 ppm.
