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

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.

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.

Helps students successfully pass written and oral examinations, offering techniques for memorizing, creating, and summarizing all kinds of texts.

School is a place everyone goes to, but are they all the same? They certainly aren’t. Learn about schools around the world and what kids eat for lunch, when their summer vacation is, and even how long they have to go each day. It may make you think school isn’t so bad after all! Get your backpack on and get ready to visit schools around the globe! This title will allow students to ask and answer questions such as who, what, where, when, why, and how to demonstrate understanding of key details in a text. • World map • Bold keywords with phonetic glossary • Multicultural

Cuando se trata de cartografiar la Vía Láctea, los científicos saben una cosa con certeza. ¡Saben que todavía hay muchas cosas que no saben! Descubra cómo estudian la Vía Láctea y aprenda sobre la galaxia que llamamos hogar. Creado en colaboración con la Institución Smithsonian, este Texto Informativo del Smithsonian desarrolla las habilidades de lectura de los estudiantes mientras despierta su curiosidad sobre temas de STEAM a través de ejemplos del mundo real. Presenta un desafío STEAM práctico que guía a los estudiantes a través de cada paso del proceso de diseño de...

¿Estás preparado para embarcarte en la aventura de los números con los Little Einsteins? ¡El equipo cuenta contigo! Utilizando las tarjetas de aventura con los números de Rocket, busca docenas de elementos divertidos de contar en cada una de las escenas llenas de acción. Cuando hayas completado la caza del tesoro, prueba los desafíos numéricos adicionales de la Sonda Mira-y-Escucha o resuelve ecuaciones simples con las piezas de puzzle magnéticas del libro.