Ciclo Del Arroz / Rice Cycle

Introduces equipment and devices commonly found in a science laboratory, including beakers, a hand lens, a microscope, and telescopes, and describes their use.

A guide to some of the most extraordinary places, objects and sights in the cosmos, from the amazing worlds of our olar system to distant galaxies and glowing nebulae--and almost everything in between. Includes 100 objects from throughout the universe, arranged from closest to our planet to farthest away. Discover the best-kept secrets of space.

All Spanish Prepositions This book is intended to explain how to use the 23 prepositions existing in the Spanish language to students of Spanish as a second language or to Spanish native speakers who want to acquire, refresh or improve their knowledge on this topic. Studying prepositions in any language is one of the hardest tasks because there are several rules to follow as well as some exceptions. The various rule categories are explained for each preposition along with numerous examples. These examples cover different contexts to give the reader multiple usage options of the language...

Las Dino-historias conjugan dos pasiones de muchos niños y jóvenes: los cómics o historietas y los dinosaurios. Conoce la fascinante historia de este gigante del período Jurásico. Al ser un espécimen de sangre caliente, el branquiosaurio requería de grandes cantidades de energía que obtenía comiendo hojas de las copas de los árboles, por eso es que tenían un cuello tan largo.