text: today my 3 year old daughter asked me why the sky is blue, i didn't know what the answer was? i knew she was gonna start springin these biggies on me sooner or later, obviosly i'd like to be honest but keep it simple (sorry really not sure what catagory this should go in) hah, tell her it's reflecting the ocean. but it's actually that the earth's atmosphere is kind of like a prism. during the day when the sun is high, it lets the blue rays in. at sunset, when the sun is at the horizon, it lets the lower frequency waves like purples and reds in. there, now you know not only why the sky is blue but also why sunsets are pretty.