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.
1 Theoretical and physical chemists study things such as molecules, atoms and chemical reactions to develop different energy sources. 2  Medicinal chemists research chemicals and compounds used to create medications for people. 3  Organic chemists investigate the makeup of different carbon compounds.