What makes the Caspian Sea unique?

It is the world's largest inland body of water

How salty is most of the Caspian?

About a third as salty as the ocean

Caspian Sea Quiz: The World's Largest Inland Body of Water

Five countries share a shoreline on the world's largest inland body of water, and this Caspian Sea quiz explains why geographers argue over what to call it. Play 10 interactive questions on its area, its depth below sea level, the Volga River, brackish water, beluga sturgeon, the Caspian seal, Kara-Bogaz-Gol, Baku's oil and the 2018 convention.

Start Caspian Sea Quiz

🎯 Daily Trivia Challenge • 🧠 10 Questions • ⏱️ 150 Seconds

Question 1 / 10 Time: 150s

Rank
What makes the Caspian Sea unique?
Countries
How many countries border the Caspian?
River
Which river supplies most of its water?
Level
Where is its surface relative to sea level?
Salt
How salty is most of the Caspian?
Caviar
Which fish is famous for Caspian caviar?
Seal
Which mammal lives only in the Caspian?
Lagoon
Which shallow, very salty lagoon lies on its eastern side?
Oil
Which capital city is famous for Caspian oil?
Treaty
What did a 2018 convention give the Caspian?

Explanations: answer key for all 10 questions

Q1: What makes the Caspian Sea unique?
Answer: It is the world's largest inland body of water
It covers about 371,000 square km.
Q2: How many countries border the Caspian?
Answer: Five
Russia, Kazakhstan, Turkmenistan, Iran and Azerbaijan.
Q3: Which river supplies most of its water?
Answer: The Volga
It provides about 80 percent of inflow.
Q4: Where is its surface relative to sea level?
Answer: About 28 meters below
It has no outlet to the ocean.
Q5: How salty is most of the Caspian?
Answer: About a third as salty as the ocean
It is brackish.
Q6: Which fish is famous for Caspian caviar?
Answer: Beluga sturgeon
It is critically endangered.
Q7: Which mammal lives only in the Caspian?
Answer: The Caspian seal
It is one of the smallest seals.
Q8: Which shallow, very salty lagoon lies on its eastern side?
Answer: Kara-Bogaz-Gol
It is in Turkmenistan.
Q9: Which capital city is famous for Caspian oil?
Answer: Baku
Oil was drilled there in the 1800s.
Q10: What did a 2018 convention give the Caspian?
Answer: A special legal status
It was signed in Aktau.

Caspian Sea Quiz – The World's Largest Inland Body of Water

The Caspian Sea, covering about 371,000 square km, is the world's largest inland body of water. It is bordered by Russia, Kazakhstan, Turkmenistan, Iran and Azerbaijan, and its surface lies about 28 meters below sea level.

The Volga River provides about 80 percent of its inflow. With no outlet to the ocean, the water is brackish, about a third as salty as seawater, while the shallow Kara-Bogaz-Gol lagoon is far saltier.

The Caspian is home to beluga sturgeon, source of famous caviar, and the endemic Caspian seal. Oil made Baku rich, and a 2018 convention signed in Aktau gave the Caspian a special legal status, neither fully sea nor lake.

What This Quiz Teaches

Geography fans will enjoy these questions.

How big the Caspian is
Who borders it
Where its water comes from
Which wildlife lives there
How its status was settled

Did You Know?

Its northern part is shallow and freezes in winter.
Water levels have dropped in recent years.
The Caspian was once linked to ancient oceans.
Ferries cross between Baku and Aktau.
Its deepest point is over 1,000 meters.