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They are a measure of one quantity in comparison to another.
Gases in air are nitrogen about 79%, oxygen about 20% and other gases 1%
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Percentages are percentages - simple! The marketing people have not yet come up with "new improved" percentages.
The earth's atmosphere comprises a volume of gases and that cannot be measured in square miles.
i don't know the percentages but i do know that hydrogen and helium are the 2 main gases! sorry this did not completely answer the question:(
Go to images.google.com and search for gases in the atmosphere.
They are a measure of one quantity in comparison to another.
Nitrogen (about 78%) and oxygen (about 21%).
Gases in air are nitrogen about 79%, oxygen about 20% and other gases 1%
line graph
Cirle Graph.
Diversity on a college campus is measured by how many of each race there are on campus. From there, percentages are derived based on the findings and that is how it's done.
Nitrogen - 78% Oxygen - 21% Carbon Dioxide - 0.04% Noble gases - 0.96%
There is no way to answer this. Percentage of what? Percentages are comparison of two things measured in the same way.
10%
The inner core of Earth contains Iron and Nickel. I do not know the percentages of each gas.