Sinkhole Quiz: Test your knowledge

Last Updated: Tuesday, August 13, 2013, 4:50 PM EDT

Florida is one of the most sinkhole-prone states in the U.S.

Think you know all there is to know about the dangerous depressions? Test your knowledge in our sinkhole quiz!

Information from National Geographic was used in these answers.

1. How many basic types of sinkholes are there?

2. Two of the world's largest and deepest sinkholes opened up in the same country within three years of each other. Where were they?

3. One of the largest and costliest sinkholes in the United States opened up in Florida. Where?

4. Which type of sinkhole is most common in Florida?

5. Which of the following are warning signs that a sinkhole may be forming?