Examines the characteristics and locations of the world's oceans, and takes a look at the various food chains that exist there, beginning with plankton and ending with top predators. Also discusses scavengers in the ocean, and how to protect food chains. Includes color photographs, a glossary, and further resources.
An introduction to dental hygiene that describes teeth, explains what causes tooth decay, discusses how to properly clean teeth and what makes them stronger, and includes related activities.
"Scientists first started talking about sending a robot to orbit Saturn in the 1980s. However, it wasn't until 1997 that the Cassini Probe launched. Readers learn not only about how the probe was built, but also about the process of planning such an important, complicated endeavor. Full-color photographs and illustrations supplement the main contents explanation of what Cassini learned as it traveled around Saturn and the cool robotic features that collected data. With an emphasis on STEM careers and amazing new technology, readers are sure to want to explore more"--Amazon.com.
Heat can do some amazing things, like turn solids into liquids and liquids into gases. But how do these changes happen? This book helps readers understand how heat changes matter, what causes things to burn, and how these changes impact a vast number of objects in our world. Flowcharts filled with vivid photographs and interesting fact boxes visually bring to life the concepts of heat and the changing states of matter, turning readers into eager scientists!.
