Books with author Clara MacCarald

State governments are relaxing laws about marijuana use for both recreational and medicinal purposes. But just how harmless is this popular drug? This informative volume explores the effects, dangers, and possible benefits of marijuana. Despite what many believe, users can become addicted to marijuana. When young people ingest marijuana, it may negatively affect the way their brain develops. However, marijuana also helps patients with cancer, AIDS, epilepsy, and other conditions. This essential book provides students with up-to-date information about all aspects of marijuana use and suggests age-appropriate resources for those struggling with marijuana addiction.

"Copper was one of the first metals humans learned to work with -- and now it's an important component of electronic technology! This informative text explores the ins and outs of this versatile element. As well as wires, people use copper to make jewelry, cookware, and statues. The Statue of Liberty sports her iconic green color thanks to copper. The metal is even needed by the human body. Take a look and discover what your ancestors already knew thousands of years ago: copper is amazing!"--Back cover.

Introduces young readers to the dangers of heroin addiction and shows ways that users have found help. Learn about the physical and mental effects of heroin abuse and its negative impact on lives. Additional features include a Fast Facts spread, an infographic, critical thinking questions, a phonetic glossary, an index, and sources for further research.

Explores methods and devices scientists use to explore the seafloor, focusing on their history, current developments, and potential for future discoveries. Clear text, vibrant photos, and helpful infographics make this book an accessible and engaging read. Plus, two ""Scientist Bio"" features highlight people who helped make this amazing technology possible.

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 you!This series features a variety of science topics aligned to NGSS standards. From mixing matter to the study of sound waves, each informative book includes a glossary, comprehension questions, and an activity for home or the classroom.