What happens when two areas of air have different pressures?

Related questions

1. What is the most comfortable barometric pressure?
2. What air pressure can humans survive?
3. What is the normal atmospheric pressure?
4. What is a dangerous blood pressure level?
5. What is normal atmospheric pressure in ATM?
6. What causes atmospheric pressure difference?
7. Is cold air high or low pressure?
8. What causes atmospheric pressure?
9. What blood pressure is stroke level?
10. What is considered low pressure?

Tags

1. #towards
2. #clouds
3. #water
4. #pressure
5. #precipitation
6. #winds
7. #system
8. #areas
9. #rises
10. #within
11. #center
12. #atmosphere
13. #where
14. #forming
15. #decreases
16. #condenses
17. #vapor
18. #lower
19. #around
20. #often