Why is the Sky Blue

Kia ora Koutou. This is my writing for Week 7 Term 1 So the teachers pretty much said that we can do a free writing that things we  don't know about. So I don't know about why is the sky blue so this is a information report why is the sky blue. And Have you ever wondered why is the sky blue if you did please write a comment below. I will be waiting for your guys feedback.