What Am I Riddles

Question: I was the first and now I am the one.

What am I?

Question: 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?

Question: What is bought by the yard by is worn by the foot?

Question: I'm measured in temperature and time, but have neither.

What am I?

Question: I build bridges of silver and crowns of gold.Who am I?