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