How can changes in temperature cause movement of air and other fluids on Earth? , “information I found on the Internet”

Winds are a result of the tendency of warm air to rise and, conversely, cool air to sink. ... Because the atmosphere constantly flows, like a fluid in a container, air rushes into such low pressure areas from cooler, high-pressure ones, and the movement of the air creates wind.

a electronegativity decreases beacuse the size of nucleus is bigger.