Fact 1: Unequal heating of Earth 's surface by the Sun causes global wind patterns.

Fact 2: Unequal heating by the sun s rays causes differences in temperature.

Given the two facts above, answer the question "Global wind patterns are caused by" with the following options: 
- plate shifts
 - fissures of hot, acidic water
 - earth rotating on axis
 - Differences in temperature
 - gravity
 - electromagnetic energy
 - scattered light
 - Greenhouse gases


 

    Differences in temperature     