Presents information learned by past and present observers of Mars, the fourth planet from the sun, and briefly describes the scientific missions that have been sent there.
Presents an investigation of comets, asteroids, and meteoroids and meteors, discussing what they are, what they are made from, where they orbit, and their impact on the Earth. Includes a glossary and resources for further study.
Clear-cut explanations, diagrams, and photos help readers follow along with these activities, allowing them to develop the abilities they need to complete future projects of their own. In this book, learn how to build birdhouses with these fun activities.
The activities in this book push readers to follow step-by-step directions, determine relationships among steps in a technical process, and build the skills they need to make the perfect crafts for the Halloween season.