Apuntes de matemáticas

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.

Los contenidos de este libro se corresponden con los de la unidad formativa 0152, del módulo "Montaje de instalaciones solares fotovoltaicas", perteneciente al certificado de profesionalidad "Montaje y mantenimiento de instalaciones solares fotovoltaicas". Este libro se ocupa de la parte mecánica del montaje de una instalación fotovoltaica, empezando por su planificación y el aprovisionamiento de materiales y centrándose en el montaje mismo y en técnicas y procesos, como la sujeción, la impermeabilización, la colocación de paneles... 1. Organización y planificación para el montaje...

As the COVID-19 pandemic has spread around the world, it's left many adults and children searching for answers about how they can stay safe. By focusing on facts presented in a relatable way rather than fear, this illustrated guide to health and safety gives children the tools they need to understand what's happening in the world and to discover how they can become a virus warrior. Facts about coronaviruses are paired with essential information about social distancing, personal hygiene, and the things we can control in uncertain times, creating a learning experience designed to reduce...

Amphibians can be found all over the world. There are more than 7,500 kinds of amphibians living in streams, rainforests, deserts, and everywhere in between. Many of them are in danger due to a deadly fungus, but help is on the way! Created in collaboration with the Smithsonian Institution, this Spanish book ignites a curiosity about STEAM topics through real-world examples. It features a hands-on STEAM challenge that guides English language learners through every step of the engineering design process. Inspire students to pursue a STEAM career with career advice from a real person working in ...