Ondas sonoras y la comunicación (Sound Waves and Communication)

Did you know that most animals in the world don't have backbones? Learn more about invertebrates in this engaging, Spanish-translated nonfiction book. Readers will learn all about mollusks, arthropods, arachnids, and crustaceans while being stimulated from cover to cover with its detailed images and charts, intriguing facts, and informative text. This 6-Pack includes six copies of this title and a lesson plan.

From Mexico to the tip of South America, Latin America features varied scenery, including deserts, grasslands, plains, and mountains. Some are extreme: The Andes is the world's longest mountain range, and the Atacama Desert has not had rain for over 400 years! Latin America's remarkable landscape is an essential factor in its surprisingly different climatic zones. This insightful volume offers a comprehensive tour of the many vibrant countries of this fascinating region, highlighting its most striking areas in vivid photographs. It is also an inviting exploration of geography, natural...

Me llamo De Sastre. Timmy De Sastre. Comienzan las aventuras de este personaje inolvidable y su inseparable amigo que no podrás dejar de leer. Me llamo De Sastre. Timmy De Sastre. Soy el fundador, presidente y consejero delegado de la mejor agencia de detectives de la ciudad, probablemente de toda la nación. El libro que tenéis en vuestras manos es un relato histórico de mi vida como detective. Todos los datos que recoge están contrastados. Todos los dibujos que lleva los he hecho yo. Intenté que mi socio Total hiciera las ilustraciones, pero no eran buenas.

Discover the military personnel that guard our skies, the aircraft that they use and the high-tech equipment.