Prehistory is any time before there were written records. That is generally considered to be anything beyond 20,000 years ago, even though writing itself is a little more recent yet.
In the past 800,000 years ice core records show CO2 levels barely dipped above 280 ppm once, during a warm spell about 300,000 years ago. We have other evidence indicating CO2 levels have not exceeded 300 ppm in the past 20 million years, up until 1950. Since 1700 CO2 has been steadily increasing as a result of human activity.
The carbon cycle moves carbon in and out of the atmosphere, the land, plants and animals, and the oceans. Carbon dioxide in the atmosphere is a greenhouse gas that keeps the planet warm. Too much carbon dioxide in the atmosphere, from humans adding it by burning fossil fuels, is causing an accelerated greenhouse effect, global warming.
Most of carbon in the atmosphere is in the form of CO2. At nearly 400 ppm, that pencils out to 3 trillion tonnes (metric tons). To single out how much of that is carbon we need to multiply by 12 (molecular weight of carbon) and divide by 32 (molecular weight of O2). That works out to 1.1 trillion tonnes. There is additional carbon in the atmosphere in the form of methane (CH4), carbon monoxide (CO), chlorofluorocarbons (CFC), and a few other carbon compounds. If you count pollen, wind born leaves, birds, and other things occasionally swept aloft, the atmosphere temporarily suspends much more carbon yet.
False.
yes the atmosphere is a long term carbon store
It is not fixed in the atmosphere. It moves as part of the carbon cycle in and out of the oceans, the atmosphere and the land.
it should still be carbon, but too much carbon is bad for the atmosphere. Google: "Carbon in atmoshpere" and see why it's bad
Carbon is known from prehistoric times.
Carbon Dioxide at .033% The only other two sources in the atmosphere are methane and carbon dioxide both of which are much less abundant.
The carbon cycle moves carbon in and out of the atmosphere, the land, plants and animals, and the oceans. Carbon dioxide in the atmosphere is a greenhouse gas that keeps the planet warm. Too much carbon dioxide in the atmosphere, from humans adding it by burning fossil fuels, is causing an accelerated greenhouse effect, global warming.
Yes, but it is much thinner than Earth's atmosphere, and has considerably more carbon dioxide.
I have no clue. How much do you put in the atmosphere annually?
The ocean water absorbed much of the carbon dioxide from the atmosphere.
95.32% of the Martian atmosphere is Carbon Dioxcide.(aka CO2)
carbon exist in earth crust as 0.02% and in atmosphere 0.03%
Earth's atmosphere is about 0.035% CO2. Since the atmosphere is just a thin layer of gas surrounding the earth, CO2 is a much, much smaller fraction of the earth itself.
The discovery of Carbon is prehistoric. You can find it in campfires.
There is much more nitrogen in earth's atmosphere than carbon dioxide. Nitrogen forms about 79%, while carbon dioxide makes up about 0.04%.