#244 What's the Kennection?

1) What "salt-producing" chemical elements name the type of high-temperature lamps used for stage lighting and car headlights?
2) What comedy aired its 636th episode in April, surpassing Gunsmoke as the longest-running scripted primetime show in U.S. history?
3) Atzei chaim, or "trees of life," are the wooden rollers used in a synagogue to hold what text?
4) What band invented the word "zigazig-ha" during a last-minute rap addition to their 1996 hit "Wannabe"?
5) Cayuga and Seneca, the deepest bodies of water in New York State, are in a group of lakes nicknamed for what part of the body?
What's the "Kennection"?
Ken Jennings was on Jeopardy! 75 times in a row, so long that your grandma got sick of him. He is the author of nine books, most recently the Junior Genius Guides for children. He lives in Seattle.