The text on the board describes a practical geography lesson. What are the main tasks students are asked to complete?

Practical Tasks:

• 1. Choose a mountain system or plain for description.
• 2. Determine the location of the object on a physical map.
• 3. Measure the extent of the mountain system or plain using a ruler, and determine the maximum and minimum height of the mountain system or plain according to the height scale on the map.
• 4. Briefly characterize the climatic conditions in the area of the mountain system or plain, indicate which natural zones are represented in the mountain system or on the plain, using information from the atlas.
• 5. Describe how humans use a mountain system or plain in economic activities, using additional sources of information.