The diversity of the tertiary sector:

The diversity of the tertiary sector:

- The tertiary sector and its importance.

- The classification of services.

- Commercial activity:

- Trade and its instruments.

- Domestic trade.

- Foreign trade.

- Transport:

- Systems and means of transport.

- Transport on land.

- Water and air transport.

- Tourism:

- Tourism and its types.

- Tourist areas.

- The repercussions of tourism.

- The land relief of the Earth:

- Land relief. Continents and islands.

- The forms of land relief of the Earth.

- The hydrosphere. The waters of the Earth:

- The marine waters.

- The continental waters.

- The main rivers of the continents.

- The atmosphere and the climates (I):

- The atmosphere and the climate.

- The climates of the warm zone.

- The atmosphere and the climates (II):

- The climates of the temperate zone.

- The polar and mountain climates.