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.
April 2010: Slime Chemistry. Chemists are scientists that study what objects are made of and how different chemical materials interact with each other. Chemists study different types of chemicals and try putting them together with other chemicals to see if a change occurs. Then they try to figure out what the new materials can do, and brainstorm ways people can use them in their lives.