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They have increased the levels of the greenhouse gases.

(Apex)

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What three dramatic events that changed the earth atmosphere?

Three dramatic events that changed the Earth's atmosphere include the Great Oxidation Event, which led to the buildup of oxygen around 2.4 billion years ago, the Chicxulub asteroid impact that caused the Cretaceous-Paleogene extinction event around 66 million years ago, and the eruption of the supervolcano Toba around 74,000 years ago, which caused a volcanic winter and significant climate change.


How has te Atmosphere changed over the last billion years?

Over the last billion years, the Earth's atmosphere has changed significantly. Initially, it was likely composed of gases like hydrogen and helium. Over time, volcanic activity released gases like carbon dioxide, nitrogen, and water vapor, leading to the formation of the early atmosphere. The development of photosynthetic organisms like cyanobacteria contributed oxygen, eventually leading to the oxygen-rich atmosphere we have today.


How has the atmosphere changed over the last 4.5 billion years?

Due to photosynthesising, single celled organisms, the atmosphere now has much more oxygen in it. this is possibly the most important change as with out we would exist. The atmosphere originally had much more carbon-dioxide and made the planet so hot humans would not be able to survive.


What did the atmosphere contain millions of years ago?

Depending on how far back, the atmosphere has changed. Around the cooling of the Earth, it would mostlikely contain large amounts of sulphur, methane and other volatile gases, coming straight from lava flows.


How have photosynthetic bacteria changed the composition of the atmosphere?

Photosynthetic bacteria, particularly cyanobacteria, played a pivotal role in shaping Earth's atmosphere by producing oxygen through photosynthesis. This process, known as the Great Oxygenation Event, occurred around 2.4 billion years ago and led to a significant increase in atmospheric oxygen levels. The rise of oxygen allowed for the development of aerobic life forms and changed the chemical composition of the atmosphere, making it more conducive to the evolution of complex organisms. This transformation laid the groundwork for the diverse ecosystems we see today.

Related Questions

How have humans changed the atmosphere of the planted in the past 200 years?

They have increased the levels of the greenhouse gases.(Apex)


How has life changed for humans in the past 300 years?

how has life changed in the last 300 years


How have cinemas and theatres changed in the last 20 years?

the seating has changed the atmosphere & everything that you see now was all different back then


How have humans changed the atmosphere of the plants in the past 200 years?

Humans have significantly altered the Earth's atmosphere in the past 200 years by increasing the concentration of greenhouse gases, primarily carbon dioxide, through activities like burning fossil fuels and deforestation. This has led to global warming and climate change, impacting weather patterns, sea levels, and ecosystems worldwide.


How humans change the atmosphere of the planet in the past 200 years?

They have increased the levels of greenhouse gases.


Why did the earth's atmosphere change after it was first formed?

The earths atmosphere has significantly altered over the years. The process of the earth's atmosphere was recognized and evolved 2.7 billion years ago, forming the nitrogen-oxygen atmosphere that exists today. This change enabled the formation and beginning of the ozone layer (which along with magnetic fields) block solar radiation.


How has the earths atmosphere changed over millions of years?

The earth's atmosphere has changed significantly over millions of years due to various factors such as volcanic activity, changes in the Earth's orbit, and the evolution of living organisms. For example, early Earth had a different composition with high levels of carbon dioxide and little oxygen. Over time, the atmosphere changed to its current composition with nitrogen as the dominant gas and oxygen supporting life.


How have the Three Sisters mountains in Katoomba Australia changed over time?

well, the blue mountains have changed in many ways, such as the scratch marks that the humans have made in the rocks. the shape and form of the three sisters have changed with all the erosion in the years. the forest is in great danger as not much plant species are grow back and the wild life is fading.


How did the flowering rush get to the great lakes?

The Flowering Rush has been in Michigan for many years


How long will the air last?

If you mean our atmosphere, then it depends. If the population of animals does not increase dramatically and us humans "go greener", then the toxic chemicals in our atmosphere will lower and the atmosphere will stay healthy for millions of years. If we stay like we are now, polluting the atmosphere, then the air will get ruined within a few hundred years.


How have fairies changed over the years?

They have been around for millions of years. They dont like when humans discover them. But fairies are real!!


How has the earths atmosphere changed?

The earths atmosphere has significantly altered over the years. The process of the earth's atmosphere was recognized and evolved 2.7 billion years ago, forming the nitrogen-oxygen atmosphere that exists today. This change enabled the formation and beginning of the ozone layer (which along with magnetic fields) block solar radiation.