According to the book, the newspapers of the 1920s could be divided into two broad categories. One group consisted of factual, middle-of-the-road papers popular with middle and upper-class readers. The , on the other hand, featured sensational stories, large headlines and images, and appealed more to newly literate and newly urban readers.

name two ways organisms join a population and two ways organisms leave a population. two ways organisms join a population are birth rate and immigration. two ways they leave are death rate and emigration.

explanation:

the steam engine.

the locomotive.

the telephone.

the telegraph.

the internal combustion engine.

the rifle.

ironclad ships.

electricity/light bulb.