What does this Rebus Picture means ?

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 cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

Which is heavier: a ton of bricks or a ton of feathers?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

What is the word or phrase?

What is the unique property of the following words ?
* Revive
* Banana
* Grammar
* Voodoo
* Assess
* Potato
* Dresser
* Uneven

It is a nine-letter word.
The exact opposite of the phrase "friendly and outgoing"
It contains the word "over".
It starts will a vowel.

What is it?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

Solve the below puzzle by replacing the question mark with the correct number.

3 6 12

4 8 16

5 10 ?