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.
How is chemistry used in forensic science? Chemistry is a valuable tool in forensic science that helps uncover  information from physical evidence. In criminal cases, chemists  analyze substances such as blood, DNA aâ¦nd gunpowder residue to  determine when and by whom the crime was committed.