Hottest Cities in United States. Two major cities contend for the title of hottest city in the United States. The city that comes out on top depends on how you measure heat. Phoenix Arizona excels at extreme hot weather. It consistently ranks number one for the most days a year when temperatures rise above 89 Â°F or 99 Â°F. Miami challenges Phoenix for top spot on hottest year-round temperatures.
would a chemist most likely study: a leaf changing color in the fall. OR. a leaf floating on water. Follow.
Chemists study matter and energy and reactions between them. You'll need to take advanced courses to become a chemist, so it's not a job you pick up right out of high school. If you're wondering how many years it takes to become a chemist, the broad answer is 4 to 10 years of college and graduate study.