The 30 sections that make up Earth's surface are known as physiographic provinces. They are based on the variations in landforms, topography, climate, and vegetation. Here is one example of a physiographic province:

Great Plains:

The Great Plains is a vast physiographic province that stretches from the Rocky Mountains in the west to the Central Lowlands in the east. It covers parts of the United States and Canada. The Great Plains is characterized by flat or gently rolling terrain with a mix of grasslands, prairies, and forests. The region is known for its rich agricultural lands and abundant natural resources, including coal, oil, and natural gas. The climate of the Great Plains is continental, with hot summers and cold winters. The region experiences frequent severe weather events, such as tornadoes and blizzards.