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.

Aunque los estudios de Bachillerato completan, en sí mismos, una etapa de formación, es indudable que en la mayoría de los casos son paso necesario hacia otros estudios de rango universitario. Este libro ha sido diseñado para abarcar esa doble finalidad. Por una parte busca ser un complemento de lo explicado en el libro de texto o en la clase; desea, por otra, ser una ayuda en ese tránsito intermedio entre el Bachillerato y los primeros cursos de Facultades y Escuelas Universitarias.

It takes different parts to build a house. The floor is built first. Walls need to be added next. Windows and doors, too. Learn about the steps it takes to build a house. Paired to the fiction title We Have a Box.

Cerca de 100 animales se esconden en cada una de las ilustraciones a doble pgina que contiene este libro. Las escenas representan la fauna y los distintos hbitats de la Tierra, desde el abrasador desierto del Shara hasta las glidas regiones rticas, los pantanos de Florida y la Gran Barrera de Coral australiana. Los animales del mundo es un libro para pasar muchas horas entretenidas. Adems, junto al dibujo de cada animal se incluyen datos y curiosidades presentados de forma clara y concisa.

This extraordinary book shows in a simple way how the Sun's light and warmth affect Earth. Children will be amazed to learn that the Sun is actually a star, and that its position and distance from Earth cause day and night as well as changing weather and the seasons. Simple, brief explanations also describe Earth's rotation and tilt, Earth's two poles and the equator, a solar eclipse, how plants make food from sunlight, and how sunlight colors our world.