En el libro se explica cómo se protege a la población de las inundaciones.
Con gráficas e ilustraciones muy claras, se explica el ciclo del agua y la importancia de ésta en la vida del planeta Tierra.
This new book will blow readers away! Accessible text, interesting facts, and bright, colorful design create an engaging combination for young readers. Readers will discover how wind forms, its affect on people, plants, and animals, and the tools scientists use to measure wind direction and speed. A hands-on experiment teaches readers how to make a wind vane and use it to find the winds direction.
Weather changes from day to day and season to season. But what exactly is weather and how is it created? Readers will discover the answers to these questions and many other weather wonders. Bright, full-color photographs, inviting text, and engaging questions introduce readers to the different types of weather in our world and how it affects our lives.
From gentle showers to heavy downpours and slow flurries to hail, this appealing title will be a hit with readers rain or shine! Readers will learn the basic concepts of the water cycle, the features of different kinds of precipitation, and the role temperature has in determining what falls from our clouds.
Temperature is a measure of how hot or cold something is. Temperature affects our lives from the clothes we wear to the activities we do. This engaging and entertaining title inspires a solid understanding of this essential concept. Readers also discover how a thermometer is used to measure temperature using units called degrees.
What are Forests? brings to life the wondrously complex and diverse ecosystems found in forests around the world. Intricate relationships and concepts are explained in a simple way with the help of beautiful color photographs. Children will be fascinated by the earth's many types of forests, the elements that make up a forest ecosystem, the wide range of plant and animal species that live in different forests, and the importance of forests to the rest of the Earth.
The constantly changing ecosystems of salt and freshwater wetlands support an amazing variety of wildlife species. Children will be intrigued by the fascinating animals that depend on wetlands, such as alligators and hippopotamuses, and the plants that grow there. This engaging book investigates swamps, salt marshes, and flood plains, the many plants and animals that live in wetlands, and the threats to these ecosystems and their wildlife.
Biomes are the major communities of plants and animals in our world. Children will love learning about life in everything from the chilly arctic tundra biome to dry, grassy savannahs.
Children will learn about the many land habitats in which baby animals are raised. This introduction looks at forests, grasslands, mountains, and deserts and features appealing photos of wolf pups, baby orangutans, rhinos, guanacos, and foxes.
Engaging photos of baby lions, hippos, zebras, giraffes, and rhinos highlight this introduction to African savannas Interesting information focuses on the special needs of animals in this habitat, including how they find water during the dry season and stay cool in the intense heat.
Children will love the photos of the exotic baby animals that live in rain forests around the world, such as tigers, monkeys, lemurs, elephants, and sloths. Young readers will also learn about the different kinds of rain forests and discover what life is like for baby animals in both wet and dry seasons.
This book introduces habitats for baby animals in freshwater rivers, lakes, ponds, and wetlands. Children will be fascinated by pictures of baby hippos, geese, swans, alligators, tigers, muskrats, nutrias, river otters, and more.
Captivating photos of baby alligators and crocodiles, raccoons, herons opossums, turtles, and other animals show children which animals are found in wetlands across North America. Readers will get a close-up look at how the animals' lives change as the seasons change.
Cute baby coyotes, prairie dogs, bobcats, falcons, and bison are just of a few of the grassland animals featured. Young readers will learn about food chains, prairie weather, underground homes, and how animals stay safe in grasslands.
Children will love the appealing photos of baby animals that live in both cold and warm oceanspenguins, seals, dolphins, whales, sea turtles, corals, and many kinds of fish. Young readers will also find out how baby animals survive in this salty, underwater habitat.
Delightful photos of baby raccoons, deer, bears, wolves, lynx, owls, and other animals show children which animals live in forests. Young readers will learn about food chains and see how life for baby animals changes with the seasons.
Children will be captivated by the amazing photos of baby animals that live on mountains: bighorn sheep, mountain goats, antelope, cougars, marmots, chipmunks, and other animals. Young readers see how baby animals find food and shelter in such rugged places.
Children will love the up-close photos of baby animals that live in deserts: jackrabbits, hyenas, kit foxes, tortoises, camels, meerkats, and more. Readers will learn how baby animals keep cool in the scorching heat and stay alive in dry deserts.
In 1912, German meteorologist Alfred Wegener proposed that the continents were once a single land mass but had slowly moved apart over millions of years. This fascinating book examines the scientific process behind Wegener's theory and how it challenged prevailing views of the time. Learn how years after Wegener's death his theory was embraced by scientists and is now the basis for modern earth science.
The Tigris and Euphrates rivers surround a region once known as Mesopotamia, the "cradle" of ancient civilizations that included Sumer, Babylonia, and Assyria. This fascinating book follows both rivers from where they begin in Turkey, travel down through northern Syria and Iraq, and join to form the Shatt al Arab before emptying into the Persian Gulf.
This informative book follows the St. Lawrence River, once a main route of the fur and timber trades. This important commercial waterway forms part of the boundary between Canada and the United States and connects the Great Lakes with the Atlantic Ocean. Today, a system of canals, dams, and locks lets seagoing ships travel all the way to Lake Superior.
The Nile is the worlds longest river and the birthplace of one of the greatest civilizations of the ancient world. This book takes readers along the River in the Sand. Ancient Egyptians depended on the Niles annual floods to deposit fertile soil for farming. Today, more than 70 million people still grow crops in the rivers basin and fish in its waters.
The mighty Yangtze River, the third-longest river in the world, is the birthplace of Chinese civilization. This intriguing book takes readers along this ancient transportation route, strategic natural boundary, and lifeblood of an agricultural society. The near completion of the Three Gorges Dam has displaced more than a million people and changed the river's ecosystem dramatically.
