However, scientists do not yet fully understand the fundamental processes controlling this carbon “cycle”.
More research is necessary to explain past changes in COC produced by atmospheric weapons testing (between 19), as it dissolves in surface oceans and is taken up and respired by land plants can be traced.
The amount of carbon dioxide in the atmosphere today is higher than that at any time in the last 420,000 years (figure 1).
While the roughly 30% increase in CO also occurred in the past, presumably related to shifts in global climate.
AMS dating is possible on very small samples (a few milligrams).
It does not need much supervision, so it could be used in a large class.
You will need: The dice rolling itself takes only 20 minutes, the graphing another 15 minutes and the questions another 20 or so (but this last part is the most variable).
On longer timescales, the radioactive decay of C provides information on slower exchanges with the much larger stores of carbon in the deep ocean and the carbon stabilized in soils and sediments.
Radiocarbon is the best and often the only way to quantify rates of exchange of carbon among reservoirs.