What Am I Riddles

Question: I have two rings. I move by request. If the mixture isn't right I just sit and rest.

What am I?

Question: I go up and I go down,
towards the sky and the ground.
I'm present and past tense too,
Let's go for a ride, me and you.

What am I?

Question: You can easily touch me, but not see me.
You can throw me out, but not away.

What am I?

Question: I sizzle like bacon, I'm made with an egg.
I have plenty of backbone, but not a good leg.
I peel layers like an onion, but still remain whole.
I can be long like a flagpole, yet I fit in a hole.

What am I?

Question: What flies when it's born, lies when it's alive, and runs when it's dead?