Multiple choice general knowledge science & technology

What is the color of sea?

  1. Colorless

  2. Blue

  3. Bluish Green

  4. Green
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pure seawater is actually colorless in small quantities. The blue appearance we see in oceans and seas is due to water's molecular properties - it absorbs longer wavelengths of light (red, orange) and scatters shorter blue wavelengths, making large water bodies appear blue.

AI explanation

Water itself is essentially colorless — the sea appears blue (or green, grey, etc.) due to the way sunlight interacts with water molecules and suspended particles, not because seawater has an inherent pigment. Water absorbs red/warmer wavelengths of light more than blue, and scatters blue light, which is why large bodies of water look blue to our eyes, but the water itself has no true color. This is a classic trivia framing where 'Colorless' is the scientifically correct answer, while 'Blue,' 'Bluish Green,' and 'Green' describe the sea's apparent color under certain lighting/depth conditions rather than its actual color.

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