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 The New York City Subway System (Building America: Then and Now)In 1912, workers digging to create the Broadway Subway, north of Murray Street in lower Manhattan, hit a brick wall approximately 21 feet (6.4 meters) below the street surface. Breaking through the wall, the laborers came upon a tunnel 9 feet (2.7 m) in diameter and lined with eight- inch- thick (20.32 centimeters) bricks. Two rails led into a... | | The Hoover Dam (Building America: Then and Now)
The time was the early 1930s, the president was Herbert
Hoover, and the situation in the United States looked bleak.
The stock market had crashed in 1929, and most Americans were
hurt by the Great Depression, which left a majority of them jobless,
homeless, and penniless. But in the West, a beacon of hope
was in the... | | The Brooklyn Bridge (Building America: Then and Now)Opened on May 24, 1883, the Brooklyn Bridge is widely considered the greatest engineering achievement of the 19th century. This vision of designer John Augustus Roebling would be the longest bridge ever built at the time. During the 30-year construction period, the project withstood city politics, numerous construction conundrums and accidents, and... |
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Environmental Regulations and Global Warming
When the 2007 Nobel Peace Prize went to former Vice President Al Gore and an international scientific body that warned of serious consequences if Earth's temperatures continue to rise, the award underscored the international concern about the Earth's changing climate. Most scientists agree that global warming is a serious threat, and... | | How Does a Spacecraft Reach the Moon? (Science in the Real World)The Moon is very far from Earth. Yet, scientists have been able to get satellites, shuttles, and other spacecraft into space and a few manned spacecraft to land on the Moon. "How Does a Spacecraft Reach the Moon?" reveals the science behind propulsion and the energy it takes to get large craft into space. Colorful photographs and... | | How Do Hybrid Cars Work? (Science in the Real World)In recent years, there has been much concern about the world's reliance on nonrenewable resources, such as oil. Scientists are attempting to decrease our dependency on oil - something cars require to work. Hybrid cars, which run on alternative energy sources like sunlight, corn, and biofuels, may be the key to using less oil. "How Do Hybrid... |
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How Fighter Pilots Use Math (Math in the Real World)The jet engine roars as Colonel Maria Sanchez races the F-35 down the runway. The plane leaps into the air. At 1,000 feet, she banks and circles the Air Force base to give three other fighter planes time to take off and join her.
Sanchez heads north. The three other planes fall into formation around her. Together, the planes make a... | | How Race Car Drivers Use Math (Math in the Real World)The drivers have suited up and climbed into their cars. Engines roar. All eyes are on the checkered flag. The flag drops. The drivers roar off—challenging themselves, their teams, and other drivers to perform to the best of their ability. Math is used by the drivers, by their pit crews, and by race car designers before, during, and after a... | | How Deep Sea Divers Use Math (Math in the Real World)With a jump off the edge of a boat, deep sea divers enter another world. There is much to explore, since oceans cover more than 70 percent of Earth’s surface. Many types of scientists study the oceans. There are also people who dive to do their jobs underwater—or dive just for fun. These people all use math before, during, and after... |
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Digital Piracy (Cybersafety)
The Internet has had and will continue to have a profound effect
on society. It is hard to imagine life without such technologies as
computers, cell phones, gaming devices, and so on. The Internet,
World Wide Web, and their associated technologies have altered
our social and personal experience of the world. In no other time in... | | Health Science Experiments (Experiments for Future Scientists)
From choosing healthy food to taking care of one's teeth, and from exploring the ways infection is spread to studying nerves, the health science field is a broad category of study. This book presents activities about health science issues to encourage students to make lifelong, healthy choices. ... | | Broadband Internet: Access, Regulation and PolicyThe internet has become so widespread that such issues as access, regulation and related policies have become major factors in the economy and social fabric of societies in every part of the world. Peoples without running water are demanding access to the internet and those without it are becoming deprived citizens. This new book examines current... |
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