Why is the Sky Blue

- Have you ever wondered why the sky is blue? Well that is what we are learning is science right now. We are learning why we see colors and how light works. We really haven't learned why the sky is blue but this it what I think:

I think that it is blue because the atmoshper abosorbs the other colors( red, orange, yellow, green, violet and indago) and then reflects the blue. So we see only the blue. Another one of my theroies is that The  

atmosphere reflects the blue from the ocean. But why I don't really believe that is because the ocean isn't all over the world. If this is true why do we have blue skies over the continents? I will be writing next week the correct answer for why is the sky blue.