What forms when a large high-pressure system lingers over an area for several days

Air mass.

An air mass is a volume of air defined by its temperature and water vapor content. It forms when a large high-pressure system lingers over an area for several days. Air masses can cover many hundreds of miles, and they tend to adapt to the characteristics of the surface below them.

step 1. boil eggs

step 2.eat eggs

step 3. get your hot poonts ready

answer; ///approx///5,000 miles;