Why is it the sky blue

From the sun, we receive all sorts of radiation. However, the radiation we do see is call visible light. It comes in red, orange, yellow, green, blue, and indigo. However, not all wave lengths are created equal. Red wave lengths are the longest and indigo wave lengths are the shortest. This means red wavelengths are able to continue past the several different layers of atmosphere. However, the blue one is short and is often scattered back by air molecules. This is called Rayleigh Scattering and preferentially scatters shorter wavelengths forwards and backwards. This gives the sky a blue look.

The reason the bodies of water a blue is because the water reflects the sky.

Sunlight reaches Earth's atmosphere and is scattered in all directions by all the gases and particles in the air. Blue light is scattered more than others by the nitrogen in Earth's atmosphere.

Because of the reflection from the sea? .. No wait, maybe thats the other way around? I dunno i sucked in school