I have teeth but i don't bite. Who Am I ?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

It is always ahead of me yet I can never see it. What is it?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

What is so fragile that saying its name breaks it?

I have a mouth but I don't eat.
I have a bank but have no money.
I have a bed but i dont sleep.
I wave but have no hands.

Who Am I ?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

What can you catch but never throw?