Clara MacCarald

"Hydrogen is the most widespread element and one of the building blocks of life. First appearing when the Big Bang created the universe, hydrogen is now part of human technologies that could change the future. People have used liquid hydrogen to send astronauts into space and hydrogen gas to drive families to the store. In this informative text, we'll explore the first element in the periodic table, looking at its properties and finding its hiding...

"Describes the history and science behind virtual reality, including the new ideas and applications scientists are currently working on. Includes "How It Works" special feature"--

The Revolutionary War was a revolution in culture as well as politics. The war affected people all over the country. The struggle disrupted colonial life, setting neighbor against neighbor. Patriots came together to resist British rule and to create a new society. In the end, America gained not only its independence, but also the chance to make a government founded on the idea of rul by the people themselves --

"Describes various weapons used in World War II on land, in the air, and at sea."--

Gives readers a look into the lives and abilities of people who have epilepsy, as well as the challenges they face. Learn how medications, special diets, and service dogs can help people manage their epilepsy. Additional features include a table of contents, an informative infographic, a Fast Facts spread, critical-thinking questions, a phonetic glossary, a selected bibliography, an index, sources for further research, and information about the author....

Energy flows all around you. It warms the air and powers our machines. In this book, readers in grades 4-9 will discover how power from the sun journeys to Earth's surface and back out to space. The sun's energy can be reflected, absorbed, used by plants and animals, given off, or trapped to warm the atmosphere. Learn how heat in the atmosphere is rising and what people can do about it. Earth's energy flow affects every living creature on the planet--including...

"This title examines the history and use of solar energy, the pros and cons of the technology, and next steps for this important energy source"--

Offers readers a compelling look into the lives, challenges, and successes of Japanese immigrants. Additional features include a Fast Facts page, a timeline, informative photo captions, critical-thinking questions, primary source quotes and accompanying source notes, a phonetic glossary, and additional resources for further study.

What will the weather do today? Learn about the methods people have developed to predict the weather, from looking at the sky to running models on a computer. Meteorologists use factors such as temperature, air pressure, and wind speed to determine whether to look out for a blizzard or a tornado. Weather prediction not only helps you plan your day, it can even save lives!

Offers 12 different views on the waves of European settlers during colonial times. Each page provides information about what happened during European colonization and how it affected different people, along with interesting sidebars, questions to consider, and historical images.