Why does the sky look blue from the earth and black from the moon?

A phenomenon called Rayleigh’s Scattering causes light to scatter when it passes through particles that have a diameter one-tenth that of the wavelength (colour) of light. Sunlight is made up of different colours, but because of the elements in the atmosphere, the colour blue is scattered more efficiently than other colours making the sky appear blue. However, the moon does not have an atmosphere, so light is not scattered, and the sky appears black.