Los estados de la materia — Los gases

En este libro, Alfonso Pérez-Agote aborda los temas centrales de su trayectoria académica e investigadora a lo largo de las últimas cinco décadas: la identidad, el nacionalismo, la religión, la diferenciación social y los variados problemas que enfrenta la teoría sociológica. El autor reelabora cuestiones como el problema general de la identidad colectiva, las raíces sociales y los mecanismos sociales de la reproducción del nacionalismo vasco, así como su politización y radicalización desde el franquismo hasta la desaparición de ETA. Centra también su atención en el proceso de ...

The Earth is a remarkable place! In the universe, Earth is the only place that we know for sure has life and non-life. Learn all about interdependence in ecosystems with this Spanish science reader that brings the power of science and informational text to students at a level they can understand. Introduce students to STEM topics and new vocabulary terms like oxygen cycle, stimuli, homeostasis, and micro-organism with this nonfiction book that is aligned to state and national standards. The leveled text supports students reading at above-, below-, and on-grade level. The fun lab activity...

Learn how people collect data for weather predictions, the U.S. government census, emergency rescues, and more! This Spanish-translated title teaches readers about data collection, approximation, and estimation through practical examples.

What’s the difference between a seal and a sea lion? These “second cousins” of the sea look similar, but there are many ways to tell these creatures apart. From ear shape to the noises they make to communicate, seals and sea lions are amazing creatures with both shared features and many truly unique attributes. They both share an ocean habitat, but when readers take a closer look, it’s easy to discover how they each fight off predators, mate, and raise their young in different ways. Captivating full-color photographs help to bring these marvelous mammals to vivid life.