Why is the Caspian Sea sometimes called a lake?, It is not connected to an ocean., It has fresh water., It is very deep., How big is the Caspian Sea?, 371 000 km², 100 000 km², 50 000 km², How many rivers flow into the Caspian Sea?, 10, 50, 130, Why does the Caspian Sea become saltier?, Water leaves only through evaporation., Many rivers carry salt into it., It is connected to the ocean., What animal lives in the Caspian Sea?, Dolphin, Caspian seal, Penguin, How many countries border the Caspian Sea?, 3, 4, 5, What produces caviar?, the sturgeon, the Caspian seal, the Caspian turtle.

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