¿Cuántos Agujeros Tiene Un Anillo?

Reveals the truth about cannibalism in pre-Columbian America, avoiding sensationalism and opting for historical accuracy on a matter that has been subjected to all sorts of misinterpretations as well as mistaken beliefs.

Like all living things, plants need to reproduce to survive. Wind, water, animals, and people all play a role in this process. This nonfiction Spanish book teaches students about plant reproduction, and introduces them to important scientific concepts and vocabulary terms like angiosperm, gymnosperm, gametophyte, and pollination. The intriguing images, detailed diagrams, and stimulating sidebars will keep students connected to the text. The fun lab activity provides a real-world learning experience that supports STEM instruction. Aligned to state and national standards, the leveled text...

Wind Power: A waving flag, blowing leaves, a kite soaring through the skyall are moved by wind power. Wind is also our fast-growing source of energy. Find out how wind forms and the different ways we may use it in the future.

Diseñado como respuesta al temario oficial del Curso de Orientación Universitaria, y como Manual de Iniciación para aquellos alumnos/as que cursen estudios de Física General en las Escuelas Universitarias. Una exposición teórica suficientemente profunda, complementada con una amplísima colección de problemas - unos, explicados y resueltos; otros, propuestos e indicada su solución - proporcionan un conocimiento directo de la materia y sus aplicaciones.