If you can't name the two countries involved in "The XYZ Affair," you might not be ready for Knowledge Bowl. Throughout the school year, hundreds of kids across Minnesota, and thousands more across the country, put their learning on the line at Knowledge Bowl meets. Kids from seventh grade to 12th grade compete, facing questions that range from history and geography to math and poetry. Later today Junior Varsity teams from northern Minnesota will gather in the town of Mountain Iron for the final stage of a big round-robin tournament. Minnesota Public Radio's Chris Julin watched the second round of the tournament last week and has this report.