The increased deployment of railroads in the 19th and 20th centuries had several effects. From the answers below, what was NOT an effect of the increased deployment of railroads?

a. Establishment of time zones
b. Increased use of coal
c. Increased deforestation
d. Development of the light bulb
e. Development of the telegraph

5. what is a red giant? can our sun become a red giant? why or why not?

The great scientist alfred wegener proposed that continents have moved, while other scientists such as t. c.chamberlin argued against wegener. wegener's ideas eventually won, and are now widely accepted, because: a) wegener's ideas were more beautiful, and so were favored by the intellectual elite. b) wegener's ideas did a better job of predicting the results of new observations and experiments. c) wegener's ideas appealed to dead white european males, whereas chamberlin's didn't. d) wegener's ideas appalled dead white european males, and we all know that in this politically correct era, dead white european males cannot get a fair shake. e) wegener won the nobel prize.

Why is the study of demography important to geographers