Explains how bacteria and viruses affect the human body and how the body fights them.

Explains why oil spills occur and how they are cleaned up and suggests strategies for preventing them in the future. Did you know that an oil spill occurs somewhere in the world almost every day of the year? Berger and Mirocha focus on one of the worst spills in history-the 1989 Exxon Valdez oil tanker spill-to explain in simple terms and with bold, full color illustrations why oils spills happen, how experts clean up after them, and what effect spilled...

Find out about all the different kinds of mountains.

In simple text, presents the three states of matter, solid, liquid, and gas, and describes their attributes.

A lively introduction to the rainforest combines illustrations and diagrams with explanations about the abundant plant and animal life that can be found there.

"Winds whip. Waves crash. Rain pours down. A superstorm moves across the ocean and gets closer and closer to land. Hurricane watch! Read and find out how hurricanes form, how scientists track the storms, and what you can do to keep yourself safe if one strikes. With colorful illustrations from Taia Morley and engaging text from Melissa Stewart, Hurricane Watch is a look into a powerful natural disaster."--Provided by publisher.

"You are lying in bed listening to the soft sound of rain. It has been coming down for hours. Now something is changing. The rain sounds harder and louder, and there is water running down the road, which looks like a small river. What is happening? You are hearing and seeing the start of a flood. Read and find out about the different kinds of floods, how they start, and how to stay safe. With colorful illustrations from Amy Schimler-Safford and engaging...

"How does a magnet work? Why does a magnet pick up a paper clip but not a leaf or a penny? How can the whole world be a magnet? Read and find out more about how magnets work! Franklyn M. Branley's classic text is seamlessly updated by NCTE Orbis Pictus Award Honoree Carolyn Cinami DeCristofano in this reissue. Now rebranded with a new cover look, this book features rich vocabulary, fascinating sidebars and diagrams by artist True Kelley, and a find-out-more...

Explains how the invention of the telephone changed the world and outlines concept-introducing scientific activities, including how to build a string phone.

Millions of people live in cities around the world, but have you ever wondered how cities work? All those people need clean water to drink, a safe place to live, and a way to get all around the city! How do you take care of all those people's needs? Your city has a plan for that. Read and find out all about the systems a city has to help keep everyone safe, healthy, and happy.