he southern part of the plain has navigable waterways and rich, black soil called _________________ that supports agriculture.

Draining most of western Russia, the _________________ travels 2,293 miles (3,690 km), making it the longest river in Europe.

Located in southeast Russia, Lake _________________ is the oldest lake in the world (25 million years).

The _________________  covers about one-third of Siberia and is one of the largest low-lying flatlands in the world.

Mount ____________ is also a popular tourist destination for skiing and mountain climbing.

In Ukraine, the _________________ River is the longest in the country, stretching 609 miles (908 km) beginning in the northwestern plains and traversing southeast to drain into the Black Sea.

Its short growing season and thin, acidic soil lying just above the _________________ limit the kinds of plants that can grow there.

Russia holds large _________________ deposits and 16 percent of the world’s coal reserves;

The _________ Mountains form a natural barrier between European Russia and Siberian Russia.