Describes the kinds of trace evidence forensic scientists can use to track down and identify criminals and how such evidence is collected and analyzed, and offers examples of cases in which forensic science was used.
From roaring oceans to trickling streams, water covers seventy percent of our planet! But did you know that less than one percent of Earth’s water is usable by humans? Most water on Earth is salt water. It can’t be used for drinking, bathing, or growing plants. We need freshwater. Yet about two-thirds of Earth’s freshwater is frozen solid at the North and South Poles. And the water we can access—from lakes, rivers, streams, wetlands, or underground sources—is in danger of being polluted. There is not enough water to waste. We must join together in the quest to protect this valuable resource. With engaging text and eye-catching images—plus a special Going Green section—this book tells you all about Earth’s water and what you can do to protect it.
Discusses the environment and issues concerning keeping the environment clean, how energy is produced and consumed, what happens to the waste products, how we can change the environment and the future of the Earth's environment.
High accessible writing and a magazine-style format draw readers into this timely series on cutting-edge science. Each title illustrates how scientists solve problems and develop new technology. This book focuses on genetic engineering.
Shows readers how familiar plants and animals change and develop over the course of their lifetime. This book features photo-illustrated life cycles and fact files.
This beautiful new edition of our popular series takes an in-depth look at the ever-changing lives of familiar plants and animals. Each book contains colorful photos and illustrated timelines to help children understand the stages of development.
In every age, science and technology have advanced human civilization. From architecture to engineering, medicine to transportation, humans have invented extraordinary wonders. Transportation technology has seen significant changes over the centuries. Ancient people traveled on foot and on the backs of animals. People invented wheels and sailing ships, which helped them travel farther and carry larger loads. Fast forward to modern cars, subways, and airplanes and we’ll find that even the sky’s not the limit. In the twenty-first century, people are planning tourist flights into space. In this book, we’ll explore seven wonders of transportation. These wonders include roads and mass transit systems, including the ancient Silk Road, the London Underground, and the U.S. Interstate Highway System. The wonders also include vehicles such as bicycles, airplanes, spaceships, and the glorious ocean liner Queen Elizabeth II. The newest vehicles are “supergreen” cars, which save energy and help the environment. From the basic to the cutting edge, we’ll learn where transportation has been and where it’s headed.
In the field of social policy, some topics are so complicated that they will always be subject to debate. Since no clear right or wrong exists, they are consigned to the gray areas of ongoing dispute. Among such issues open for debate both across America and in this eye-opening series are capital punishment, genetic engineering, gun control, and global warming. Others involve terrorism and chemical and biological warfare, two outright evils, though with highly disputable solutions. Open for Debate explores the past, present, and future to shed light on complex, high-priority public policy. A lucid, readily accessible format offers the pros and cons of each issue with opinions from social policy experts. It features sidebars of fascinating facts and easy-to-understand diagrams of key statistics. Open for Debate introduces future public policy thinkers to both sides of twenty-first-century, life-and-death concerns.
Describes the conditions that contribute to hunger, including poverty and environmental problems, and details efforts being taken to rid the world of the problem.
Describes the alternative methods of generating energy instead of using fossil fuels, including solar power, wind power, and biofuels, and speculates on the future of alternative energy.
Profiles the work of six individuals whose work shaped the field of forensic science: Alphonse Bertillon, Edward Henry, Karl Landsteiner, Edmond Locard, Clyde Snow, and Alec Jeffreys.
The discovery and purpose of DNA, as well as what understanding the human genome means for the future, are competently outlined in this volume. Pros and cons of many ethical issues are covered--from stem cell research to designer babies.
Discusses the discovery of DNA fingerprinting, the processes involved, its initial use, and its past and present role in forensic identification, conservation biology, and human genetics.
Hidden cameras take our pictures. Computer technology records everywhere we go on the Internet. The government gathers information on us in the interests of national security. In many ways, our right to privacy is increasingly being challenged in today's world. In Privacy vs. Security: Your Rights in Conflict, author Ron Fridell explores the issue of privacy. He examines the history of the right to privacy as well as the laws and technological developments that affect this right. Fridell looks at the ways that terrorism has changed how we feel about global security. Privacy vs. Security helps young readers understand the effort to balance our desire for privacy and our need for safety. Book jacket.
Describes a journey into the rain forests of Surinam to see brightly colored poison-dart frogs in their natural habitat, and discusses efforts to preserve them.
This series shows readers how familiar plants and animals change and develop over the course of their lifetimes. Photos, labels and timelines support concepts covered within the text. Suitable for Middle Primary.
Describes several different theories on the causes and solutions of global warming, including a brief history of the Earth's temperature ranges, scientists' predictions for the future, and the governments' reactions.
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