Probability Definition. The probability of an event is a number between $0$ to $1$ which measures the chance of that event occurring. The likelihood of the occurrence of the event increases as the probability varies from $0$ to $1$. The probability of the occurrence of an impossible event is $0$ and that of a certain to occur event is $1$.
As altitude increases, air pressure decreases. Gravity causes the atmosphere to become heavier the closer you are to the ground. The atmosphere may seem weightless but all the â¦ air molecules add up to a tremendous amount of mass.
The higher above sea level you go, (for example, the tops of mountains,) the more separated and spaced out the molecules become, which causes cold weather. This is the ACCURATE answer to how elevation affects temperature. learned the answer to this in science this year, so don't worry, it is accurate: The higher above sea level/elevation you are, the colder the temperature becomes. The reas â¦ on for this is because there are air molecules in the air bump closer together when you are lower above sea level-that creates warm weather.