For thousands of years the Magical Dragon of Knowledge has been teaching
those in need. He has worked with scientists throughout the ages but the
question still remains. Who will the dragon help next?
Hey, Toni. Hey, Alex.
Are you glad it's finally warmed up around here?
The air feels so nice. I'm so glad it's mostly oxygen.
Actually, that's a common misconception.
The atmosphere isn't actually mostly oxygen. It's actually mostly
nitrogen. But I see what you mean. Fresh air is refreshing.
Alex, you gotta be kidding me.
The air has to be mostly oxygen or else we wouldn't be alive
right now. Come on, Tony, it's not that hard to wrap
your head around. The atmosphere is mostly nitrogen. Man, I really wish
there's some mythical creature that could explain this all to me.
Whoa! It's the Magical Dragon
of Knowledge.
Well Tony, your friend Alex is correct. The Earth's atmosphere is 78%
nitrogen and only 21% oxygen, with the most of the last 1% of the atmosphere
being argon as well as some water vapor. This means that there is almost three
times as much nitrogen in the air then there is oxygen. Wait, then how do we
breathe and why is there so much nitrogen in our atmosphere?
Fortunately, Tony, we don't need that much oxygen
and nitrogen is extremely important too.
Nitrogen is actually a pretty important structural component of proteins. The
levels of nitrogen in the atmosphere doesn't fluctuate because the nitrogen
cycle returns all the nitrogen that's used up back into the atmosphere.
Wow, I was so uneducated. Thank you so much Magical Dragon of Knowledge.
See, Tony, this is why you need to pay more attention in class, and go to more reliable sources
like nasa.gov.
Whoa! Where'd he go?
Bye Magical Dragon. Bye. Wherever you are...