Exploremos el ciclo de la roca (Exploring the Rock Cycle)

When winter hits, many people in colder climates spend most of their time indoors. But what do wild animals do? Some animals spend winters hibernating. Beginning readers will learn what hibernation is, why some animals hibernate and others don't, and how hibernating animals prepare for their long sleep. Full-color photographs grab readers' attention and allow them to draw connections to the narrative. Readers will love learning about this mysterious, restful time in some animals' lives.

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.

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.

Follows The Thirteenth Amendment That Freed The Slaves, The End Of The War, And The Death Of President Abraham Lincoln.

Some of the most powerful things in the world are so tiny they can't be seen with the naked eye! Readers will be amazed at what they see when they take a glance at the world of the mini but mighty in this stunningly fascinating Spanish-translated nonfiction title that features remarkable images and graphics, informational text, index, and glossary. Through these features, readers are able to explore and discover such micros as DNA, atoms, bacteria, phytoplankton, and nanotechnology items like nano-robots and microchips!

Tailored to the Language B syllabus, our full-colour IB coursebook, Mañana, contains everything you need for your two-year teaching course.

Una hermosa introducción a la diversidad. A través de textos sencillos y magníficas ilustraciones, este libro presenta diez parejas de personajes con personalidades opuestas. Cada personalidad se define en todos sus matices, tanto en sus cualidades como en sus excesos. Desde la infancia convivimos con personas que se parecen a nosotros y con otras que tienen un carácter claramente diferente. Existen los que son serios y los alegres, los simples y los complicados, los expresivos y los discretos... Poco a poco, descubrimos que detrás de esta aparentemente sencilla clasificación se...