Good Riddles

Question: Whoever makes me can hear me, but nobody else can.

What am I?

Question: I grow from trees and your home,
once I am grown I fall to my doom.

What am I?

Question: What can float but can't sink.

Question: What can you smell but not see. And can be deadly, too.

Question:

John has some chickens that have been laying him plenty of eggs. He wants to give away his eggs to several of his friends, but he wants to give them all the same number of eggs. He figures out that he needs to give 7 of his friends eggs for them to get the same amount, otherwise there is 1 extra egg left.

What is the least number of eggs he needs for this to be true?