Los fósiles y las rocas

Three Quarters Of Our Earth Is Blanketed By Water. How This Water Is Used, From Bathing To Irrigating Crops Is Addressed. That Water Travels In A Never-Ending Pattern Called The Water Cycle. Tips On How To Conserve Our Most Important Natural Resource Are Included.

No town or city could be built if the builders didn't understand the concepts of perimeter and area. Students will use perimeter and area to build towns and cities and design homes and parks in the book, Pueblos y ciudades (Towns and Cities). At home or in the classroom, this nonfiction book will engage students in learning measurement and geometry, and how to grid patterns, through fun practice problems and diagrams.

An introduction to the night sky, describing major constellations and the planets of the solar system.

Este volumen te descubrirá aspectos inéditos de la vida de especies de felinos distintas al león y el tigre, que ya conoces por otros tomos de nuestra colección "Animales salvajes". Ahora te presentamos felinos como el leopardo, la pantera, el jaguar, el guepardo y otras especies de felinos de pequeño tamaño, como el lince, el ocelote, el puma o el gato salbvaje. Conociendo la forma de vida de estos hermosos felinos, aprenderás a amarlos y a defender su conservación.

An ideal book for young Spanish students; proposes a new progression that promotes language acquisition and consolidation of contents, offers numerous grammatical and lexical and formal practice aid activities within the unit and contains a competency evaluation at the end of each chapter.