1. how did new industries change the lives of americans in the 1920's?

The new industries changed the lives of Americans in the 1920s because of the modernization, this allowed Americans to work for lesser hours while enjoying more leisure time as well as their hard earned money. The 1920s was considered a time for positive results in the industry of consumer goods and American families, because of higher wages, shorter working hours, and manufacturing was up 60% in consumer goods.  Hope this is the answer that you are looking for. 

The new industries changed the lives of Americans in the 1920s because of the modernization, this allowed Americans to work for lesser hours while enjoying more leisure time as well as their hard earned money.