useless trivia: What Word Means: A First Name - The Material Of Elephant Tusks?

Questions

List the 1st & last names of all 4 Sweathogs on Welcome Back Kotter??

How did Jamie Sommers become bionic??

Name every actress who played an 'angel' on Charlie's Angels?

What color is the car that Starsky & Hutch drive??

What sci-fi tv show of the 60's became a Filmation cartoon in the 70's??