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

What is so fragile that saying its name breaks it?

John leaves home and then he takes three right turns. John wants to return to home but he was scared of Jacob, who is wearing a mask.

What is John Situation ?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

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 English word has three consecutive double letters?

What goes up but never comes down?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

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?

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 ?