Watching National League Football is one of the most popular forms of entertainment in the United States, so this may be a fairly easy question: how many of the 32 teams can you name? Bonus points if you can put them in the proper conference (I’m not asking about divisions within the conferences).

***

Yesterday’s question was: The atmosphere, the air around us, this stuff we breathe without thinking about it (well, except when we’re experiencing a heat wave). But, do you recall what it is you’re actually breathing? Which elements make up the “air” of Earth’s atmosphere that we breathe? Bonus points if you can arrange in order of percentage of each in the air (I’m not asking for the actual percentages).

The answer: The major constituents of dry air, by volume, are:
Nitrogen — 78.084%
Oxygen — 20.946%
Argon — 0.9340%
Carbon dioxide — 0.0415%
Neon — 0.0018%
Helium — 0.0005%
Methane — 0.0002%
Krypton — 0.0001%
The amount of water vapor in the atmosphere varies significantly by place, ranging from 0 to 3% of the volume of air. It makes up about 0.25% of the atmosphere by mass.

***

Ian’s Tough Trivia is a daily feature of this blog (Monday’s category is History; Tuesday is Arts; Wednesday is Science; Thursday is Entertainment; and Friday is Grab Bag). Each day, I post a tough question, as well as the answer to the previous day’s question. Simply comment on this post with your answer. I’ll approve the comments after the next question is posted. Sure, you can probably find the answers by searching the web, but what’s the fun in that?

And if you’ve got a favorite trivia question—or even just a topic for which you’d like to see a question—let me know! Reader participation is warmly encouraged.