What Am I Riddles

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

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: 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: I live in your house yet, you do not love me. I eat your food, yet you squeal in fright at the sight of me. What am I?