When Prof. Quirrel did a jinx to throw Harry Potter from the broom during a Quidditch match, Prof. Snape did a counter-jinx to save him. Note: It was Hermione Granger who actually stopped Quirrel's wrongdoing by distracting him.
No. But he works for the 'Light Side'.
Severus Snape was on Peter Pettigrew's "side" for a short amount of time. As you probably know, Snape was a true Death Eater and worker for Voldemort for a short amount of time. Snape was a Death Eater for Voldemort until he found out that Voldemort was after the Potter family. Snape immediately went back to Dumbeldore and asked for forgiveness. From then on Snape became a double agent, meaning he worked for Dumbeldore and Voldemort, he told Voldemort false news about "Dumbeldore's Side" and true news to Dumbeldore. Because Pettigrew was on Voldemort's side for a while, he was on at the same time as Snape, but only for about a month or so.
Yes, in the end, it turned out Snape had been working with Dumbledore the entire time.
Very much.
The real answer is that Snape was on Dumbledore's side, so he killed Dumbledore on Dumbledore's orders. He has been a fake servant to He-Who-Must-Not-Be-Named.
Tobias Snape is Severus Snape's father.
When Severus Snape killed Albus Dumbledore, everybody believed that he did it because he was on Lord Voldemort's side so no, he was no longer a member of the Order of the Phoenix. However, after Harry Potter witnessed Snape's memories and learned that he was indeed on their side, they believed him. By this point Snape was dead and the Order of the Phoenix had been disbanded for the final time.
Snape Snape Severus Snape.
Severus. I know a song Snape Snape Severus Snape! Found it online
Towards the end of the book 'Harry Potter and the Deathly Hallows', Voldemort orders his snake Nagini to kill Snape. As Snape is lying on the floor taking his last breaths, he gives Harry memories that relate to his protection, conversations that Snape had with Dumbledore and memories showing how Snape fell in love with Harry's mother. Harry then viewed these memories in the pensieve and was forced to realise that Snape had been attempting to protect Harry and was acting as a spy for Dumbledore all along.
Sam Snape's birth name is Christopher Snape.