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