Why does the sky appear blue?
The sky appears blue because of the way the atmosphere scatters blue light from the sun more effectively than other colors, which results in the blue light being visible from the Earth's surface.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Why does the sky appear blue?

### Response:
The sky appears blue because of the way the atmosphere scatters blue light from the sun more effectively than other colors, which results in the blue light being visible from the Earth's surface.