🌊 Why is the sea blue?

The sea is blue because it reflects the color of the sky! 🌞 When the sun shines, the sky looks blue, and the water copies it like a big mirror. Sometimes, the sea can also look green or gray, depending on the weather and what's inside the water.

💡 Fun fact: Did you know that if you take a cup of sea water, it will look clear, not blue? The blue color only shows when there's a lot of water together!

The sea looks blue because of how sunlight interacts with water. 🌊 Sunlight is made of many colors, and water absorbs colors like red and yellow but scatters blue light, making the sea appear blue.

Sometimes, the sea can look green if there are tiny plants called algae in it. Or it might look brown near rivers because of dirt and sand.

💡 Fun fact: In some places, like the Red Sea, the water looks red because of special algae that change its color!

The sea appears blue due to a scientific phenomenon called Rayleigh scattering. When sunlight hits the water, longer wavelengths (like red and yellow) are absorbed, while shorter blue wavelengths are scattered, making the water look blue to our eyes.

Other factors:

• Algae and plankton can make the water green or even red (like in the Red Sea).
• Sediments from rivers can turn coastal waters brown or murky.
• Depth matters—deeper water looks darker blue because less light reaches it.

💡 Fun fact: From space, Earth looks like a "blue planet" because oceans cover over 70% of its surface!