Science Lab: Why is the sky blue? Why is the sunset red?

The sky is blue during the day and red at sunset because light travels through Earth’s air and gets scattered by tiny particles in it.

Imagine you have a big box full of marbles, some are white, like clouds, and others are tiny, like dust. When sunlight comes into this box, it’s like shining a flashlight through it. The light is made up of many colors, just like a rainbow.

During the day, when the sun is high in the sky, blue light gets scattered more than other colors because blue has shorter waves, think of it like smaller marbles bouncing around more easily. This blue light spreads out all over the sky, making it look blue to us.

But at sunset, the sunlight has to travel through more air before it reaches your eyes, almost like going through a longer tunnel. Along the way, most of the blue and green light gets scattered away, leaving behind the red and orange colors, the bigger marbles that don’t bounce as much. That’s why the sky looks red or orange at sunset.

It's all about how light travels through the air and what happens when it meets tiny particles, just like playing with marbles in a box!