Why is the sky blue and what causes its changing colors?

The sky is blue because tiny particles in the air scatter light from the sun, and different colors behave differently.

Imagine you have a big jar full of tiny blue marbles. When sunlight goes through the jar, those marbles bounce the blue part of the light around. That’s why we see blue all over the sky most of the time, like when you look up on a sunny day.

When the sun is low in the sky, like at sunrise or sunset, its light has to travel through more air to reach us. It's like walking through a longer hallway full of blue marbles and other colored marbles too.

As the blue light gets scattered away, we start seeing more red and orange, just like when you mix paint. That’s why sunrises and sunsets look so pretty with warm colors!

When it’s cloudy or rainy, bigger particles in the air scatter all the colors more evenly, making the sky look gray, like mixing all your paints together into a muddy color.

So even though the sky looks like it changes its mind, there's a simple reason behind every colorful day!