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The Science Behind the Color of the Ocean
Contributed by: Flynn
  • 1. What causes the ocean to appear blue?
A) Sediment concentration
B) Plastic pollution
C) Algae bloom
D) Scattering of sunlight
  • 2. What phenomenon can cause coastal waters to appear brown?
A) Ocean currents
B) Solar radiation
C) Sediment runoff
D) Deep-sea fish
  • 3. Which color is often associated with very clear ocean waters?
A) Brown
B) Purple
C) Turquoise
D) Gray
  • 4. What does the term 'oceanic photic zone' refer to?
A) The upper layer of ocean where sunlight penetrates.
B) An area free of pollutants.
C) The deepest part of the ocean.
D) A zone with no organisms.
  • 5. What human activity can change ocean color?
A) Sailing.
B) Pollution and runoff.
C) Swimming.
D) Fishing.
  • 6. What type of water can appear green due to high nutrient levels?
A) Eutrophic water
B) Brackish water
C) Oligotrophic water
D) Saline water
  • 7. What happens to light as it penetrates deeper into the ocean?
A) It reflects back immediately.
B) It becomes more intense.
C) It gets absorbed and scattered.
D) It stays the same.
  • 8. Which ocean color is associated with high levels of dissolved organic matter?
A) Deep blue
B) Clear blue
C) Brown
D) Golden
  • 9. What is the primary reason for the green color in many coastal areas?
A) Mineral deposits
B) Higher salinity
C) Temperature changes
D) Phytoplankton presence
  • 10. In which ocean regions are blues and greens most prevalent?
A) Desert coastlines
B) Volcanic islands
C) Tropical and subtropical regions
D) Polar regions
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