検索キーワード： 科学・テクノロジー

You may have asked yourself before now: if plants are alive, why don't they eat? The answer is they do eat, but not in the same way as humans and animals. Green plants, algae, and some bacteria are able to use energy from the sun as a kind of food that enables them to live and grow. The complicated process by which this happens is called photosynthesis.

In 2007 only 30 Amur leopards remained in the wild. Scientists knew they needed to do more to help these big cats. However, details of the leopards' wild lives in their high-altitude forest home were still a mystery. With the help of new technology and the cooperation of scientists and governments around the world, people have learned more than ever before about these rare cats. An innovative plan is under way to give Amur leopards a more secure future. Can these cats rebound from the brink before it's too late?

Did you know that the same wind that messes up your hair can be used to create energy? How exactly do you harness the wind? And what is the effect on the environment? Listen to this audiobook to find out all about wind energy.

Whiteboards, computers, and stickers. What do these things have in common? They're all tools Ms. Crawford uses in her job. Ms. Crawford is a fourth grade teacher. She invites a group of students learning about community helpers to visit her classroom. She shows them the many ways she helps her students learn. Hooray for teachers!

What do construction workers do? Some lucky kids are about to find out! They visit Mr. Moore, a construction worker who's helping to build a new school. He shows them machines that dig big holes. He explains how he follows the building plans. And he tells about different workers and how they stay safe. Hooray for construction workers!

Todos los meses hay un ciclo en el cielo. Aprende sobre los patrones de la luna y cómo cambia durante cada mes.

Los lectores principiantes aprenderán sobre los patrones básicos del Sol y la Tierra y lo que causa día y noche.

Hi, there! I'm an oak tree. You might see me everywhere, but have you ever stopped to think about how I got there? Learn more about my life cycle and how I went from a tiny little acorn to a big, beautiful tree.

The icy cold Arctic is home to both the powerful polar bear and intelligent orca, two mighty predators. But which animal is the fiercest of the ecosystem? Does the polar bear’s patience in stalking its prey and strength in attack put it on top? Or does the orca’s ability to work in a pod give it the edge?

Have you ever heard of a reptile that spends most of its life in an egg? What about a reptile that has to lay its eggs on the same beach where it was hatched? Young listeners will learn all about Madagascar chameleons, sea turtles, and other reptiles with unusual life cycles.

Nikola Tesla was a scientist and inventor in the late 1800s and early 1900s. Among his many inventions and experiments, he helped create the modern electricity system. Learn more about Tesla's life as a famous inventor!

Air Force One keeps the U.S. president safe while flying. Learn more about the features that protect this amazing plane. Also find out how team members protect the president as he travels on Air Force One.

How can important information and valuable items be kept safe as years pass? Many of these items are stored in underground vaults, including recordings and photos from U.S. history, important documents, and more. Locks, guards, secret passwords, and technology all play a part in the protection of the items.

From hibernation to baby animals and falling leaves, life in the forest changes from season to season. Discover why snow is good for trees. Learn how wildfires help the forest grow.

What dinosaur would you be if you had a bony ridge rising from the back of your skull and three horns poking up from the front? Answer: a triceratops! This book will keep you guessing as you find out how human skeletons are like—and unlike—those of dinosaurs!

For centuries, people misunderstood how the heart works. As our knowledge grew, heart surgery remained a dangerous medical procedure. Even after organ transplants become common, surgeons struggled to transplant hearts and keep patients alive. But small groups of pioneering doctors attempted this difficult surgery, changing the lives of patients. This history traces their leap forward and the medical world's newest advancements in heart health technology. Learn about innovations such as artificial hearts and 3D-printed living tissue.

Covering essential curriculum areas such as human geography, physical geography, geology and ecology, First Earth Encyclopedia is a comprehensive introduction to the world around us and answers questions including: how does our planet work; what shapes it; and how do people use Earth's resources? Children can explore fascinating topics including where and how people live, weather, world environments, how to use maps and the way our planet is changing.

This book is designed to teach children the fundamentals of Python programming in a way that is engaging, interactive, and easy to follow. With the help of hands-on projects, fun examples, and interactive exercises, kids will learn how to code in just seven days. Python is a popular programming language that is used by developers to build a wide range of applications, including games, websites, and data analysis tools. It is a great language for beginners because of its simple syntax.

Are you looking for a fun and educational way to engage your child's curious mind? Look no further than our exciting fact book for nine-year-olds! Our book is packed with fascinating information on a wide range of topics, designed to help your child learn and explore in a way that's both entertaining and enlightening.

A dinosaur the size of a humpback whale with spines on its back? Listeners will be excited to learn about the Spinosaurus with leveled text to help bring it to life.