Qualifying for worlds in skills top 50

When looking at the rankings I notice elementary and middle school are combined and ranked against each other. Does that mean a team of 3rd and 4th graders are competing for one of the top 50 ranks against 8th graders, even though elementary and middle school worlds are separate events? Or will the top 50 in each division qualify? Thank you.

Roc62imp,
The Skills Challenge World/Global Rankings include all teams registered for the VEX IQ Challenge. The top 50 teams ranked in the VEX IQ Challenge will receive an invitation to register for, and attend, the VEX Robotics World Championship event. I hope that you have a wonderful season, good luck!

Best,
Brad