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