What Am I Riddles

Question: Act in my name, and thus remove me. What am I?

Question: I look green but I am not. I look blue but I am not. I look red but I am not. What am I?

Question: When warm my house expands and when cold it contracts,
I am vital to a certain type of pact.

What am I?

Question: I have curly hair I am a feline I am long I My eyes are shaped like a line. What am I?

Question: You wait for it. It appears, cracks, stays for a moment, then disappears before your eyes.