Frogs begin their lives as tiny tadpoles living in water. As adults, they live both on land and in the water. The Life Cycle of a Frog details the changes in a frog at the four stages: egg, tadpole, froglet, and adult. Illustrations, photographs, and easy-to-read text explain the facts about how the frog breathes and eats at each stage, the differences in the metamorphosis of frogs in southern and northern climates, and the dangers to frogs from pollution, pesticides, and destruction of habitat.
Mosquitoes have lived on Earth for more than 30 million years! Close-up photos and detailed illustrations depict the amazing changes a mosquito goes through in four stages: egg, larva, pupa, and adult. Kids will enjoy reading about different species of mosquitoes and - most importantly - why they bite! Topics include mosquito bodies and senses, where mosquitoes lay their eggs, the differences between male and female mosquitoes, and the diseases mosquitoes transmit and how to avoid mosquito bites.
Hundreds of thousands of beetles live all over the world in habitats as diverse as swamps, rainforests, and deserts. The Life Cycle of a Beetle describes the growth and development of these fascinating insects from egg to adult. Full-color images of all kinds of beetles, from the familiar to the extraordinary, are included. Illustrations and photographs illuminate topics such as where beetles lay their eggs, the transformation from larva to pupa to beetle, differences between male and female beetles, how beetles defend themselves against predators, the dangers faced by beetles, and how children can help beetles.
Bears are some of the most loved animals on Earth. All over the world, however, bears are at risk. In Endangered Bears, kids will learn about the lives of these beautiful animals and why they are at risk of becoming extinct. Topics include a bear's life cycle, the many habitats in which bears live around the world, how bears communicate through body language and sounds, and threats from hunting, poaching, shrinking habitats and global warming.
Readers will discover that the natural element carbon is found in all living things, including people. This fascinating book explains how the Earth's supply of carbon moves among Earth's oceans, atmosphere, ecosystem, and geosphere in a process called the carbon cycle. Accessible text and detailed images help explain such processes as photosynthesis, respiration, and decomposition. Feature boxes highlight examples of the ways in which human activity, such as burning fossil fuels, releases too much carbon dioxide into the air disrupting the balance of the carbon cycle. Readers are encouraged to find ways to take action and find solutions.
Innovations in the medical field save countless lives daily. In this fascinating title, a timeline of breakthrough medical inventions is explored through dynamic photographs and interesting fact boxes. Fleming's advances with penicillin and the invention of the X-ray machine are some of the featured inventions that keep us in the best of health!
This exciting title explores the groundbreaking modes of transportation that have helped define the modern age. From Henry Ford's Model T car to the bullet trains of Japan, students will travel along and learn about the monumental successes and failures that have driven our world ahead.
Chemical engineers are involved in developing things we use daily including cleaning supplies, fuels, and medicines. This book gives readers insight into this fascinating profession, including information on new environmentally-friendly technologies. Readers explore fundamental chemistry concepts including the states of matter and mixtures and solutions. Readers are then guided through the steps of the Engineering Design Process to complete a chemistry-related design challenge.
This fascinating book explains the patterns and cycles created on Earth by the influence of the Sun and the Moon, as well as by the Earth's magnetic poles and the planet's rotation on an axis. Informative text, vivid photographs, and detailed diagrams help explain patterns such as day and night, the four seasons, the lunar cycle, the rise and fall of tides, and weather cycles.
From the telegraph to text messages, this imaginative title is sure to have students talking! The ways in which people communicate has changed dramatically. The telephone to a cell phone, and mail to email are just some of the inventions examined in a progressive timeline of ways we communicate.
From sound effects in video games and movies to surround-sound theatres, this fact-filled book explores the many ways audio engineers apply the science of sound. Readers will explore how sound travels and the characteristics of sound waves. Readers will also learn how to combine their understanding of sound science and the engineering design process to tackle a design challenge of their own.
Human activities have a huge impact on the Earth. Environmental engineers apply traditional engineering practices to help improve and prevent damage from humans and the waste we create to ecosystems and our environment. Readers will learn about how environmental engineering began, and the many processes environmental engineers apply to find sustainable solutions to problems. Real-life examples help students understand key concepts related to this important profession.
Lenses, lasers, microscopes, telescopeslight engineers design all these products to help make our lives easier. In this enlightening title, students explore the many uses of optics and the design process of turning a bright idea into a reality. With an overview of the engineering design process, readers are encouraged to apply the same steps into their own optical challenge.
Historically, farming was a very taxing, physical task. Bright-minded individuals revolutionized agriculture with inventions that eased tasks and sped up production. The advent of milestone machines such as Eli Whitney's cotton gin are chronologically explored in this stimulating title.
This exciting book describes the geological makeup and history of the Mojave Desert in the United States. Located in the states of California, Nevada, Utah, and Arizona, there are several national parks in the desert including Death Valley, the hottest place in North America. Readers will learn about the people, plants, and animals such as cougars, scorpions, and rattlesnakes that inhabit this desert habitat. The Mojave Desert is also a windy place where wind farms have been set up to generate electricity. Special sections describe the desert's natural resources, such as borax, silver, and gold, and the unique problems facing this region.
Introduces facts about anacondas, including physical features, habitat, life cycle, food, and threats to these rainforest creatures. Photos, captions, and keywords supplement the narrative of this informational text. Questions in the backmatter ask for text-dependent analysis.
Introduces facts about chimpanzees, including physical features, habitat, life cycle, food, and threats to these rainforest creatures. Photos, captions, and keywords supplement the narrative of this informational text. Questions in the backmatter ask for text-dependent analysis.
The mountain gorillas of Central Africa are a critically endangered species because of poaching, hunting, habitat loss, exposure to human diseases, and war. Readers will find out more about how people are working together to save these animals through habitat conservation and education.
At one time, the howling of gray wolves was a common sound throughout North America. Readers will learn more about these pack animals and what brought them to the edge of extinction. They will also find out more about the steps that have been taken to reintroduce gray wolves to the territories where they once roamed freely.
With fascinating information and facts, alongside beautiful pictures, students will learn about the Karner Blue Butterfly, its status on the endangered species list, why it has become endangered, and how it is planning on staging a comeback on the road to recovery.
The graceful, little key deer lives in the Florida Keys. Readers will learn more about these deer, how they became endangered, and what conservation groups are doing to help them make a comeback.
Gray whales live in the Pacific Ocean and can grow to be 50 feet (15 meters) long. Readers will discover how whale hunters brought these huge mammals to near extinction and how people are working together to help these giants of the sea fight for survival.
The whooping crane is a unique bird found only in North America and known for its whooping call great height for a bird. Readers will learn about the whooping crane's fight for survival as hunters killed them for their beautiful feathers and humans drained their wetland habitats to build houses.
The American bison was hunted to near extinction in the 1800s as settlers moved west across what is now the United States. Readers will learn about this animal that is a symbol of the American West and find out what steps were taken to help increase the American bison population.
Readers are introduced the habitat and lifestyle of the American Alligator and learn how the American Alligator is making a comeback from near extinction. Find out how people in the southeastern United States are learning to live with these amazing creatures.
