<|im_start|>user
Why does the sky appear blue during the day?<|im_end|>
<|im_start|>assistant
The sky appears blue during the day due to a phenomenon called Rayleigh scattering. When sunlight enters the Earth's atmosphere, it collides with air molecules and scatters in all directions. Blue light has a shorter wavelength than other colors, so it is scattered more effectively. This scattering is why we see a blue sky most of the time. Additionally, during sunrise and sunset, the light has to pass through more atmosphere, scattering shorter wavelengths and allowing longer wavelengths, like red and orange, to dominate the sky's appearance.<|im_end|>

<|im_start|>user
Why does the sky appear blue during the day?<|im_end|>
<|im_start|>assistant
The sky is blue because of the reflection of the ocean. When the sun shines, the water reflects its color into the sky, making it look blue. Sometimes, it can look reddish or orange when the sun sets, but generally, it just looks blue or clear.<|im_end|>

Why does the sky appear blue during the day?