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