The occurrence of 1. event is deterministic and uncertain. Deterministic events are described by "certainty" or "impossibility", while uncertain events are described by "possibility".

2. The possibility is related to the quantity. Under the same conditions, the more the quantity in the total, the greater the possibility; The smaller the number, the less likely it is.

3. Understand that the possibility of an event is large or small, and the possibility is related to many factors such as the basic conditions and development process of the event.

4. Through activities, we can deepen our understanding of the possibility, express the possibility with scores, and design the scheme according to the specified possibility.

5. In objective events, the "impossible" phenomenon is represented by data as "possibility is 0", and in objective events, the "sure" phenomenon is represented by data as "possibility is 1".