Why Is the Ocean Blue?

The video explains why the ocean appears blue, debunking the common belief that it is due to sky reflection. Instead, the ocean's color is primarily due to water's inherent properties and its absorption of light. Rayleigh scattering causes the sky to be blue, but water absorbs red, yellow, and green light more effectively, allowing blue light to penetrate deeper. Variations in ocean color can occur due to algae or river silt. Some marine animals have adapted to deep water by being red, making them less visible. The video concludes with acknowledgments to contributors.

What is a common misconception about why the ocean appears blue?

• It is due to the presence of blue algae.

• It reflects the color of the sky.

• It is due to pollution in the water.

• It is because of the ocean's depth.

What is the primary reason the ocean appears blue?

• Reflection of the sky

• Pollution in the water

• Absorption of red, yellow, and green light

• Presence of blue algae

At what depth does the ocean appear completely dark due to light absorption?

• 2 kilometers

• 1 kilometer

• 500 meters

• 100 meters

Why might some parts of the ocean appear blue-green?

• Due to the presence of green algae

• Because of the reflection of the sky

• Due to the depth of the water

• Because of pollution

How have some marine animals adapted to the deep ocean's blue environment?

• By becoming transparent

• By growing larger

• By developing blue scales

• By evolving red coloration