Exploring the Ocean's Water Column

What percentage of Earth's livable volume is occupied by the water column?

• 100 percent

• 70 to 80 percent

• 50 to 60 percent

• 95 to 99 percent

What is the twilight zone in the ocean?

• A zone with no marine life

• The ocean's surface layer

• A part of the ocean where sunlight fades into darkness

• A region with abundant sunlight

What significant event occurs every night in the twilight zone?

• The water temperature rises significantly

• Animals migrate from the depths to the surface

• Marine life becomes dormant

• Animals migrate from the surface to the depths

What role does the nightly migration of animals play in the ocean?

• It reduces ocean salinity

• It helps in oxygen production

• It moves organic matter to deeper ocean layers

• It increases water temperature

Which organization is working to explore and understand the water column?

• WHO

• NOAA

• UNESCO

• NASA