Question

or \el,\ trains. other cities built subways by moving rail lines underground. steel bridges joined sections of cities across rivers. the brooklyn bridge designed by john augustus roebling was one such bridge. it also provided recreational opportunities because it had an elevated walkway for people to walk over the bridge. city planners also tried to restore serenity to the environment by creating parks and recreational areas. landscape architect frederick law olmsted led the movement for planned city parks. in 1857 he and another architect, calvert vaux, drew up plans for central park in new york. the finished park included boating and tennis facilities, a zoo, and bicycle paths. all of these were placed in a natural setting. in chicago, daniel burnham designed a plan that would change a swampy region near lake michigan into a recreational area. his plan resulted in elegant parks and sandy beaches along chicago’s lake michigan shores. large cities also looked for sources of food supplies. breakthroughs in agriculture technology helped cities. george washington carver had revolutionized farming in the south with crop rotation and developing new uses for crops. also, chemist fritz haber found a way to get nitrogen from the air, which led to chemical fertilizers. now farmers could provide nutrients directly to their crops. another new technology was refrigerated railroad cars. this made it possible for farmers to get their products to market without spoiling. 1. name two technological advances that helped make cities more livable. advances in communication how did technology transform communications? technology also improved the field of communications. american mills began to produce huge amounts of cheap paper from wood pulp. a new kind of high - speed printing press called the web - perfecting press was able to print on both sides of the paper, making magazines and newspapers more affordable. two brothers, orville and wilbur wright, experimented with new engines. they built a glider and then used a four - cylinder internal combustion engine and a propeller to build an airplane. their first successful flight occurred in 1903 at kitty hawk, north carolina. it covered 120 feet and lasted 12 seconds. within two years, the wright brothers were making distant flights of 24 miles. by 1920 the united states had established the first transcontinental airmail service. at one time, photography was only for professionals. they could not shoot a moving object and photos had to be developed immediately. eventually, new techniques changed this. in 1888 george eastman invented his kodak camera. with each camera, people got a roll of film. after taking the pictures, the camera would be sent back to eastman’s factory. there, the pictures were developed and the camera reloaded and sent back. this provided millions of americans with an easy way to take pictures. the camera also changed journalism. newspaper reporters could now photograph events as they occurred. 2. name two inventions that helped change the world of communications.

Explanation:

1. Refrigerated railroad cars allowed farmers to transport products to market without spoiling, ensuring food supplies for cities. City parks like Central Park restored serenity to the urban environment, providing recreational areas.
2. The web - perfecting press made magazines and newspapers more affordable by printing on both sides of paper. The Kodak camera made photography accessible to millions and changed journalism by enabling reporters to photograph events as they occurred.

Answer:

1. Refrigerated railroad cars, creation of city parks (e.g., Central Park in New York designed by Frederick Law Olmsted and Calvert Vaux).
2. The web - perfecting press, the Kodak camera.