To determine the change in temperature from 9 am to 12 pm, we can subtract the temperature at 12 pm from the temperature at 9 am.
- Temperature at 9 am: 10°C
- Temperature at 12 pm: -5°C
Now, calculate the change in temperature:
\[ \text{Change in temperature} = \text{Temperature at 12 pm} - \text{Temperature at 9 am} \] \[ \text{Change in temperature} = -5°C - 10°C = -15°C \]
The change in temperature is -15°C, meaning the temperature has decreased by 15 degrees Celsius over the three-hour period.
Explanation:
A decrease of 15°C indicates that the weather has shifted significantly towards colder conditions within just a few hours. This may suggest the arrival of a cold front or other atmospheric changes that caused temperatures to drop rapidly. The fact that temperatures can switch from a mild level (10°C) to a sub-zero level (-5°C) within the span of three hours is noteworthy and can have implications for weather-related activities, safety, and planning, particularly if individuals are unprepared for such a drastic change in temperature.