Un día en... el Imperio Romano (Un día en...)

Black holes are neither holes nor black. They're invisible and packed with matter! Future astronomers will find out many more fascinating facts about these space phenomena with this intriguing book. Carefully crafted text encapsulates the most important information about black holes, such as how scientists locate them and their significance in a star's life cycle. Amazing photographs support critical concepts and inspire a true appreciation of the spectacles of space.

Describes the frogs, toads, and salamanders of Mexico's Yucatan Peninsula, looking particularly at the wide variety of adaptations found in the few species that dwell there.

Cada cuaderno tiene 64 páginas y están pensados para trabajarlos durante todo el curso pues las actividades que contienen son reflejo de los contenidos que se abordan en primer curso. Cada una de las páginas contiene tres o cuatro actividades, numerando las actividades por página. Las actividades están planteadas de forma progresiva, en orden de dificultad creciente, de manera que las actividades que figuran al principio del cuadernillo son para trabajarlas en los comienzos del curso, a medida que éste avanza se trabajarían actividades de páginas intermedias y al final de curso...

Every day, living things grow and change. How do they do it? Find out by exploring the life cycles of various animals. This nonfiction Spanish book teaches students important scientific concepts and terminology. The diagrams, sidebars, text features, and colorful images will keep students connected to the text. Aligned to state and national standards, the fun lab activity provides a real-world learning experience that supports STEM instruction. Keep students reading with this fascinating Spanish book!