¿Por qué hibernan los animales? (Why Animals Hibernate)

When rocks change because of environmental conditions, the new rocks are called metamorphic rocks. A rock's chemical or physical makeup may change because of conditions such as temperature, stress, or pressure. Your readers will learn fascinating facts including where metamorphic rocks are most commonly found, the different types of metamorphism, and how metamorphic rocks are identified. Full-color photographs depict these rocks in nature. A helpful graphic organizer shows how these fascinating rocks form.

The rock cycle has been taking place for millions of years. However, geologists have only known about this phenomenon for about 300 years. Young terrestrial explorers are introduced to different types of rocks, where in the cycle these rocks fit, and where in Earth's layers each step takes place. Fact boxes provide readers with fun additional information. A diagram helps readers make sense of the new information they're learning.

Although Earth is mostly made up of igneous and metamorphic rock, sedimentary rock covers about 75 percent of Earth's land surface. This means it's the most visible kind of rock on Earth. Sedimentary rocks form when sediment accumulates and compacts. Your readers will learn how sedimentary rocks form, the different types of sedimentary rocks, and how people use sedimentary rocks. Fun fact boxes provide readers with additional information. A helpful diagram illustrates how sedimentary rocks form.

Un viejo submarino que prestó servicio durante la Segunda Guerra Mundial es reflotado para poder realizar su última singladura antes de ser desguazado. El capitán Pértil y su tripulación vuelven al escenario donde se produjo la batalla de Midway contra los japoneses. A través del periscopio descubren una isla que no existe en el mapa de navegación y deciden explorarla. Al desembarcar se dan cuenta de que los animales de la isla han sufrido una mutación. Lo que parece un misterio irá desvelándose poco a poco, hasta que encuentran unos personajes muy singulares.

Lights! Camera! It's time to explore the art of animation! This engaging, Spanish-translated nonfiction title allows readers to explore an exciting career as an animator. Readers will be introduced to the history of animation and find out what techniques and equipment animators used to turn their illustrations into the first animated shorts. Through stimulating facts, vivid images, sketches, photos, informative text, and an interview with a real-life animator, readers will discover everything about animation, including character development, storyboarding, and even how the Foley artists...

Explores The Different Parts Of The Nervous System, Including The Brain, Spinal Cord, And Central Nervous System. Correlated To Common Core, Texas TEKS, Virginia Sols, And Georgia Performance Standards.

"NO TE METAS CON JACK REACHER. PERO, SOBRE TODO, NO TE METAS CON SUS AMIGOS. Hace años que Jack Reacher dejó el ejército, pero hay vínculos que nunca se rompen. Por eso, cuando recibe un aviso codificado de una antiguacompañera, Reacher no duda en acudir a la llamada de auxilio. Han asesinado a uno de los miembros de la unidad especial de la que formaron parte. Y nadie ataca a compañeros de Reacher sin salir impune. Nadie"--Jacket.