The movement of an air mass over Earth 's surface causes local weather changes, and weather is the condition of the atmosphere. Given these facts, what movement causes local changes to the condition of the atmosphere among the following options:
- air mass over the moon
 - air mass under Earth's surface
 - a hemisphere is tilted away from the sun
 - energy of moving objects
 - air mass over Earth's surface
 - pressure differences.
 - wind and erosion
 - core mass under Earth


 

     air mass over Earth's surface    