En este libro aprenderás en forma interesante y divertida sobre los procesos científicos relacionados con la fuerza, la energía y el movimiento.
En el libro se explica qué es la biodiversidad y cómo puede ayudar a conservar las especies de plantas y animales de los diferentes ecosistemas.
En el libro se explica cómo podemos usar los inventos para resolver problemas o divertirnos.
This book provides the history of biofuels along with their different uses, their positive and negative characteristics, and how they may impact the future.
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.
Young readers focus on the importance and issues of clean water.
Young readers will discover what they can do to make greener choices as they grow up.
En el libro se explica por qué los hombres debemos cuidar la tierra.
Learn how structures are being built to withstand nature's destructive forces.
Young readers discover what harms plant and animal habitats, and what people can do to help.
Historia de la NASA, sus antecedentes y distintas etapas que han repercutido en el desarrollo de la ciencia y la tecnología, además de traer influencia positiva para la civilización.
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.
In this fascinating new book Slim explores the essential nutritional value of oils and water. Children will learn why oils are essential to health, what foods produce oils, what oil products are consumed around the world, and how much oil is needed every day. Readers will also learn about why drinking enough water is essential to good health and how much water they need each day.
In this interesting new book Slim explores the essential nutritional value of the vegetable group. Children will learn about the incredible variety of vegetables and vegetable products, the history of vegetables in the human diet, what is special about dark green and leafy vegetables, what changes occur when vegetables are cooked, vegetables grown around the world, and how many vegetables a person needs each day.
In this meaty new book Slim explores the essential nutritional value of the meat group. Children will learn that this group is made up of more than meat. It includes poultry, fish, dry beans, eggs and nuts. They will also discover why tofu is part of this group, how this group helps build strong muscles, what different kinds of meats, poultry, fish, etc. are eaten around the world, and how much a person needs to eat each day from this group.
In this interesting new book Slim explores the essential nutritional value of the dairy group. Children will learn about why dairy products are so important for healthy bones and teeth, how milk is brought to market, the difference between whole milk and fat-free milk, how cheese and yogurt is made, what kinds of animals produce milk, different dairy products used around the world, and how much dairy a person needs to consume each day.
In this sweet new book Slim explores the essential nutritional value of the fruit group. Children will learn about the amazing amount of water in fruit, how fruit blossoms, why the tomato is considered a piece of fruit, the wide variety of products made with fruit, groves and orchards around the world, how worms get into apples, and how many fruits a person needs to eat each day.
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.
Learn how John Dalton developed his influential theory that explains the shape, structure, and behavior of atoms. This title also explores how Dalton's major breakthrough made later discoveries, such as atomic fission, possible.
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.
