Question: What are coral reefs primarily made of?
Quartz
Sodium chloride
Calcium carbonate
Correct Answer: Calcium carbonate
Question: What type of coral reef is found closest to the shore?
Barrier
Atoll
Fringing
Correct Answer: Fringing
Question: Which two types of coral reefs are predominant in the Caribbean?
Atolls and barriers
Banks and patches
Fringing and barrier
Correct Answer: Fringing and barrier