Best short riddles for teens

Until I am measured I am not known. Yet how you miss me when I have flown.

What is as big as you are and yet does not weigh anything?

Without looking at a calendar, within a minute name a boys name using 5 consecutive first letters of 5 consecutive months.

What makes grown men cry, but humanity would go extinct without it?

When you have me more, you can see only less. What Am I?

I cannot be felt, seen or touched, yet I can be found in everybody. My existence is always in debate, yet I have my own style of music.

What you cannot hold it but it is yours?

Tom's height is six feet, he is an assistant at a butcher's shop, and wears size 12 shoes. What does he weigh?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

What four related words are merged here: SWAS PURI UINM NTTU MGER MNER