Física y Química 4o ESO. Proyecto Neutrón

This book tells the story of farmers and life on a farm. What do farmers do? What tools and equipment do they use? Who helps them? Livestock, crops and daily chores are perfectly captured in descriptive photography. With full-color, full-page photographs throughout plus straightforward and engaging text, the I Want to Be ... series is an appealing introduction to a broad spectrum of occupations. The series gives young children a realistic insight into the working day of adults. Easy-to-read captions and color photographs of women and men from different cultures help children understand what's ...

Find out how tools have helped people hunt, build, and make life easier in this engaging, Spanish-translated nonfiction title. With colorful images, timelines, charts, a glossary to assist with vocabulary improvement, and an index, children will learn how tools throughout time have made such an important impact on life as we know it! Featured eras include the Stone Age and the Industrial Revolution.

Basic concepts about electricity. Topics include: CA circuits, Serial and parallel circuits, transformers, power distribution and circuit repairs. With questionnaire. Ideal for high-school and college.

Ecos, t’mpanos, vibraciones y volumen. V’vidas ilustraciones y textos sencillosexploran la asombrosa ciencia del sonido. Cada libro tiene un glosario, actividades pr‡cticas y fascinantes datos curiosos.