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.
A second issue is that chemists have put far more effort into studying carbon chemistry than silicon chemistry, a form of observer selection bias.48 In other words, it is possible that chemists have incorrectly ruled out silicon-based life based on an incomplete understanding of what kind of molecules silicon can form.