What is the difference between Sprint series and Nationwide in Nascar?

I’m brand new to nascar and I might go to the race next weekend but I have no idea what the differences in these series are… Can somebody explain this to me?

Sprint Car Racing

CA sprint car racing this isent and the Jr stuff, its the real thing

Nascar Sprint Cup 2009 Talladega 500 Martin flips + Big One

Mark Martin’s flip & the big one with 2 laps to go during the Talladega 500 2009.

Nascar Sprint Cup and Nationwide Series Nascar Schedule

View our Nascar schedule for any of the nascar series. There is the nascar schedule for the sprint cup series as well as the nationwide series and the camping world truck series nascar schedule

Nascar Sprint Cup 2009 Talladega 500 Newman flips (French)

Ryan Newman’s crash with French Live commentary (Abmoteurs – Pat Angeli & Philippe Chereau)

Sam Hornish Jeff Gordon Jeff Burton HUGE Big One NASCAR Sprint Cup Crash at Watkins Glen 2009

One of the biggest crashes at Watkins Glen in previous years, Sam Hornish jr gets run wide into the tyres. As he flies across the racetrack he gets hit hard by Jeff Gordon and Jeff Burton. Everyone escaped unharmed!