Los estados de la materia — Los gases

"Dino" Don Lessem brings readers face-to-face with various dinosaur species, detailing their habitats, way of life and how they became extinct. An acclaimed dinosaur expert, Don Lessem has written more than 30 children's books, writes a popular dinosaur column in Highlights magazine, and was an adviser for Jurassic Park. Take a trip through dinosaur time to meet these pterosaurs face-to-face: The Quetzalcoatlus had wings that spanned the length of a school bus! The Dsungaripterus had a bony crest on its head! The Eudimorphodon had a diamond-shaped flap at the end of its long tail! Plus you'll ...

Winning the American Revolution was just the first step. After defeating Great Britain, the American colonies were united in name only. How would this independent nation be governed? During the summer of 1787, representatives went to Philadelphia to solve the problem. The result, the U.S. Constitution, created a new government, establishing the foundations of a free nation and setting a new course for history.

¿Cómo ven, oyen, huelen, saborean y tocan los animales? ¿Sus sentidos son como los nuestros o son especiales? ¿Solo hay cinco sentidos en el mundo animal o hay más? Irene y Bruno tienen mucha curiosidad y quieren saber todo sobre los sentidos. Déjate guiar y acompáñalos en este viaje increíble en el que conocerás la respuesta a preguntas que quizá alguna vez también tú te hayas hecho. Incluye una guía para padres, con mucha información y curiosidades sobre los sentidos animales.

Do you want to set your imagination free? Do you want to dream up amazing ideas and incredible inventions? You can! This book is all about getting creative. Anyone can do it. So get ready to start thinking outside the box! This full-color nonfiction reader will engage students in reading while introducing them to new vocabulary terms and concepts. Important text features include a glossary and a table of contents to develop students' comprehension and literacy skills. This Spanish book aligns with national and state standards and features exciting TIME For Kids content to keep English...