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Coral Reefs
  • 1. What is the name of the largest coral reef system in the world?
A) Hawaii Coral Reef
B) Red Sea Reef
C) Caribbean Coral Reef
D) Great Barrier Reef
  • 2. What is a function of mangrove forests in supporting coral reefs?
A) Prevent sea level rise
B) Act as a nursery for juvenile fish
C) Provide shade for coral reefs
D) Stabilize coral limestone structures
  • 3. Which substance is built up by coral polyps to create the reef structure?
A) Sulfur
B) Iron oxide
C) Calcium carbonate
D) Silica
  • 4. What is the purpose of the zooxanthellae algae living within coral tissues?
A) Protect coral against predators
B) Regulate coral reproduction
C) Clean coral from debris
D) Provide coral with nutrients through photosynthesis
  • 5. How do coral reefs benefit humans economically?
A) Enhancing air quality
B) Serving as sources of fresh water
C) Tourism, fisheries, and protection of coastlines
D) Providing medicinal herbs
  • 6. What is the process of mutual benefit between coral and zooxanthellae known as?
A) Symbiosis
B) Commensalism
C) Predation
D) Parasitism
  • 7. What percentage of Earth's marine species are estimated to live in coral reefs?
A) 75%
B) 10%
C) 50%
D) 25%
  • 8. What is the main reason behind the recent decline in global coral reef health?
A) Expansion of marine protected areas
B) Climate change
C) Improved conservation efforts
D) Decrease in marine pollution
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