Árboles de tu ciudad

A force is a push, a pull, or a turn. Every force has an equal and opposite force. Forces are always with you! They are all around us. Learn about forces with this Spanish science reader that features easy-to-read text. Nonfiction text features include a glossary, index, and detailed images to facilitate close reading and help students connect back to the text. Aligned to state and national standards, the book also includes a fun and engaging science experiment to develop critical thinking and help students practice what they have learned.

Desde los albores de la aviación, a fines del siglo diecinueve, de inmediato resultó evidente que los aviones llegarían a convertirse en armas de enorme poder ofensivo. La confirmación llegó con la Primera y Segunda Guerra Mundiales, cuando el despliegue del arma aérea resultó decisivo en todas las operaciones. Con el tiempo, utilizando tecnologías cada vez más avanzadas, los aviones de guerra, también conocidos como aviones caza, han llegado a convertirse en elementos fundamentales del ataque y la defensa en cualquier conflicto bélico. Este interesante y entretenido libro...

Examines the nature of circles and spheres, including their properties, how they are related, and where they appear in nature.

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 ...