Kathy Campbell

Scientists believe that all forms of life developed from earlier types of living things through a process called evolution. In this intriguing and engaging narrative, readers learn that living organisms must adapt to survive as their surroundings change. By studying the developmental history of everything from single cell organisms to complex vertebrates, readers are presented with the evidence for evolution provided by the fossil record. Charles...

Geology is the study of the history, structure, and composition of the solid Earth, and of the past and present processes that act on it. It encompasses mineralogy and stratigraphy, and includes disciplines such as geophysics and geochemistry. This volume focuses on Earth's composition, including mineralogy and crystallography; igneous, sedimentary, and metamorphic petrology; economic geology; and geochemistry. It investigates Earth's structure, which...

For millennia, humanity has looked to the stars with wonder and longing. The dream of taking flight and exploring the solar system was realized in the 1950s, when the first satellites and manned orbital missions were launched. Humans continue to send scientific instruments, telescopes, and astronauts into space in an effort to learn more about the universe and about Earth. This title will explain the practical and scientific benefits of space exploration,...

Looking at a work of art, like listening to music, becomes a rewarding experience only if the senses are alert to the qualities of the work and to the artist's purpose that brought them into being. The language of sculpture must be learned. In this in-depth study, readers examine the materials, tools, methods, styles, and practices that are involved in sculpting and many of the techniques that have been used by accomplished artists who have contributed...

In this stimulating volume, readers learn about the elements of the weather, such as temperature, wind, humidity, clouds, precipitation, and atmospheric pressure. They also examine weather satellites, Tornado Alley, condensation, and the water cycle. Vocabulary boxes offer additional guidance to readers, and the Compare and Contrast and Think About It sidebars provide students with opportunities to ponder concepts in exciting and creative ways; for...

None of humanity's great achievements in space exploration would be possible without the work of the scientists who built those amazing rockets that blasted us into the heavens. This captivating resource about human accomplishments in rocket science covers the history of rocketry since the advent of rocket-powered missiles, as well as today's triumphs and our hopes for the future. Straightforward explanations of the science behind multi-stage rockets,...

When he was sworn in as US president in 1901 after the assassination of William McKinley, Theodore Roosevelt was the youngest man ever to hold the office. He was a statesman, cowboy, soldier, hunter, naturalist, and explorer. In 1904, he was elected president by a triumphant majority. This biography delves into his time in office, during which he passed legislation to regulate big business, got broad control of railroads, conserved natural resources,...

This stimulating and accessible volume offers readers a fascinating view of a force known as gravity. Readers examine many scientific concepts, including Newton's laws of gravity, mass and gravitational forces, galaxies, satellites, Earth's solar system, centrifugal force, tides, and erosion. Vocabulary boxes provide additional guidance to readers, and the "Compare and Contrast" and "Think About It" sidebars give students opportunities to ponder concepts...

After Franklin D. Roosevelt's sudden death in April 1945, Harry S. Truman took the oath of office as the thirty-third US president. While perhaps best known for his controversial decision to drop atomic bombs to end combat with Japan in World War II, Truman was instrumental in postwar recovery and international relations. As readers will discover, he instituted the Truman Doctrine to fight the spread of Communism, approved the Marshall Plan to help...

This enthralling look at the workings of the cardiovascular system introduces young readers to the human heart and its function. Along with the heart's atria and ventricles, the book explains the circulatory system and how the blood and its pathways operate. Readers get an in-depth look at red and white blood cells, platelets, plasma, blood pressure, blood types and donors, and how the lymphatic system works with the rest of the body's organs and...