New Releases by Sally M. Walker

What causes sound? How does sound travel? Sound begins when matter vibrates. Without this vibration sound could not move and nothing would make any noise. Starting with tiny molecules, this book explains the main concepts of sound and furthers understanding through a series of easy-to-do experiments that will appeal to readers of all ages.

6 PACK, PART OF LIBROS DE ENERGIA PARA MADRUGADORES SET (EARLY BIRD ENERGY)

Describes the physical characteristics, habitat, diet, and life cycle of opossums.

Text and pictures describe the Earth''s caves, including their different types, animal life, and how people explore them.

Introduces glaciers, including how they were formed, how they move, and their importance to the geography and ecology of the world, and discusses ways that we can reduce the deterioration of the glaciers before it is too late.

This book introduces young readers to volcanoes—what they are, how they form, and how they affect people.

Describes the life of Mary Anning, who discovered many of the best and most complete fossils in nineteenth-century England, yet received little credit for her work.

Includes bibliographical references (p. 45) and index.

Explains the main concepts of sound and presents easy-to-do experiments to further the reader''s understanding.

Examines the coelacanth, a type of fish that scientists thought had become extinct during the time of dinosaurs, until a live one was discovered in 1938.

Discusses electricity and currents, including instructions for how to make a circuit and see static electricity at work.

Learn about pulleys, what they are, what they do, and how they work.

Learns about the screw, the physics behind it as well as its applications.

110 million years ago, a lush river flowed through the heart of what is now a desert in Africa. Lurking in the depths of the river, a humungous monster waited for its prey to come to the river’s edge to drink...and to die. More than 40 feet long, this giant ancestor of the crocodile stalked and killed dinosaurs. In 1997, dinosaur hunter Paul Sereno discovered the enormous reptile fossil named SuperCroc. Learn how modern science uncovers the ancient past in this thrilling account of a prehistoric predator.

What is work? You may think work is doing chores or going to a job, but you do work every time you move something from one place to another. With experiments that demonstrate these fundamental concepts, discover how you work, and how simple machines make doing work easier.

On February 17, 1864, the H.L. Hunley made history as the first submarine to sink a ship in battle. Soldiers on the shore waited patiently after seeing the submarine’s return signal. But after several days, the ship had failed to return. What had gone wrong? In 1995, after over 130 years of searching, the H.L. Hunley was finally found buried off the coast of South Carolina. Follow author, Sally M. Walker on a fascinating journey through the workings of the famous submarine, its voyages, and the difficult obstacles that were overcome to recover, excavate and conserve the ship.

Each of these libraries of six delightful titles was created especially to help children understand and appreciate the beauty of the natural world. Each book, which has been written and illustrated by award-winning authors and artists, tells the story of an animal in its natural environment. Accurate in detail and rich in storytelling tradition, these books are perfect for giving and collecting. Authenticated by the Smithsonian Institution’s National Museum of Natural History in Washington, D.C.

Describes the life and accomplishments of baseball star Jackie Robinson, who became the first African American in twentieth-century major-league baseball.

Describes the basic physics behind work and simple machinery.

Uses everyday examples to show how wheels and axles function as simple machines.

Describes the 1938 discovery of the coelacanth, a fish previously believed to be extinct, and subsequent research about it.

Looks at levers and uses everyday materials to show how they help make our work easier.

Describes a sea horse living in the coral reefs of the central Philippines, its habitat, life cycle, food, and how it protects itself from predators.

Describes the physical characteristics, life cycle, behavior, and conservation of manatees, also known as sea cows.

Describes the hydrologic cycle and its importance to life on Earth.

Describes the types of sedimentary rocks, and the processes that lead to their formation.