no, nfl footballs are a little larger than ncaa footballs
Yes, high school footballs are smaller and usually have two white stripes (NCAA regulation) near the ends.
Different footballs are used for kickoffs, field goals and punts in the NFL. A sideline employee is responsible for switching the balls out before each kick.
footballs are kept at 71o F
A football is 11 inches long, so a little bit over three footballs are in a yard.
They use them for practice.
because by the time you are in the NFL you are fully grown and you are bigger than when you where in high school.
12 new footballs are marked with the letter "K' for NFL football games.
they sign it with a marker
CowHide (I am not positive on this but I think it is)
Yes. High school and college (NCAA) footballs are slightly smaller and lighter.
Information about NFL footballs can be found in many big name sporting good stores. You can also find information in library books or on the internet.