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.
The ability to recognize and correctly use the different parts of speech is key to demonstrating command of the conventions of standard English grammar and usage when writing or speaking. In this book readers will learn about the role adjectives play in sentences by following the story of Tom and his sister, Kate, who visit the zoo with their Uncle Mike. The story and activity sidebars help teach concepts such using adjectives to provide description and detail, understanding word relationships, identifying common types of adjectives, and making comparisons using comparative and superlative adjectives.
The ability to recognize and correctly use the different parts of speech is key to demonstrating command of the conventions of standard English grammar and usage when writing or speaking. In this book, readers will learn about the function interjections have in sentences by following the story of Will and Lauren, who visit a museum to see dinosaur skeletons. The story and activity sidebars help teach concepts such as correct punctuation, capitalization, and how words or phrases can have particular effects.
The ability to recognize and correctly use the different parts of speech is key to demonstrating command of the conventions of standard English grammar and usage when writing or speaking. In this book, readers will learn about the function nouns have in sentences by following the story of Steve and Judy, who join their father on a trip to the grocery store. The story and activity sidebars help introduce concepts such as abstract nouns, subject-verb agreement, and singular and plural nouns.
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 ability to recognize and correctly use the different parts of speech is key to demonstrating command of the conventions of standard English grammar and usage when writing or speaking. In this book, readers will learn about the function adverbs have in sentences by following the story of Lucy and Jon, teammates on a soccer team competing for the local championship. The story and activity sidebars help introduce concepts such as how to use adverbs for description or explanation and how to tell the difference between adjectives and adverbs.
The ability to recognize and correctly use the different parts of speech is key to demonstrating command of the conventions of standard English grammar and usage when writing or speaking. In this book, readers will learn about the role conjunctions play in sentences by following the story of Nancy, a girl who brings her family to see her work on display at an art show. The story and activity sidebars help introduce concepts such as correct punctuation and the use of coordinating and subordinating conjunctions.
The ability to recognize and correctly use the different parts of speech is key to demonstrating command of the conventions of standard English grammar and usage when writing or speaking. In this book, readers will learn about the function pronouns have in sentences by following the story of Sam and his visiting cousins, Jim and Anna. The story and supplemental activity sidebars help teach concepts such as tense, correct punctuation, relative pronouns, and pronoun-antecedent agreement.
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.
An elephant seal has a thick layer of blubber that keeps it from freezing in cold northern waters. This protective layer of blubber was prized by hunters who killed so many elephant seals that there were fewer than 100 left alive. Discover how government leaders and others took action to save these sea mammals from extinction.
The small golden lion tamarin is known for its brownish-red mane, long tail, and territorial nature. Readers will learn about these creatures and how destruction of their coastal forest habitat almost led to their extinction. Find out how zoos and conservationists have collaborated to save the golden lion tamarin.
Many people are afraid of bats, but like every other living thing they play in important role in nature. Readers will learn about cave dwelling gray bats, how they became endangered, and how government leaders and scientists have teamed up to save these furry, flying creatures.
Rock climbing can be the fun and exhilarating, and the best part is that it is an activity that also helps you stay healthy and fit. Students will learn more about how they can start climbing, the importance of good equipment, and the health benefits of rock climbing.
Skiing down a snowy slope is fun and exciting. Readers will find out what they need to get started on an outdoor sport that can get them outdoors and help keep them fit for life.
Skateboards are not just popular in America, they are popular in England, China, and Japan as well. This book will help readers understand how raw materials are made into skateboards in factories from California to China.
