1. Does any system treated in your mechanics curriculum (e.g., the motion of Earth) rise the need of probabilistic description?

2. Which of these phenomena

is probabilistic?

3. Can chaos be described by probabilities for short times?

4. Is it useful to characterize weather (e.g., is it raining tomorrow?) by giving the probability of the event?

5. Weather and chaos are rather different, is it nevertheless correct to say that both call for a probabilistic descripton?

6. What of the following features of chaos:

is the main reason for the need of a probabilistic view?