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

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.

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.

Técnico electricista 7 - Curso visual y práctico Mediciones eléctricas En esta clase veremos los fundamentos relacionados con la medición y los instrumentos utilizados para realizar estas tareas. Conoceremos las características del voltímetro, el multímetro y el vatímetro; también veremos el funcionamiento del megóhmetro, de los medidores de energía y del telurímetro, y los detalles de la pinza amperométrica. Para finalizar, entregaremos detalles relevantes sobre los sistemas de medición y conoceremos las unidades de medición más importantes en electricidad.

Colección de libros concebidos para el pequeño público, con los que cobran vida varios pasajes clave de las Escrituras. Las encantadoras ilustraciones realzan los preceptos contenidos en cada versículo. Pasajes de la Biblia en un vocabulario sencillo y moderno que los niños entienden fácilmente. Los temas de conversaciónayudan a los pequeños a descubrir aplicaciones prácticas.13 pensamientos sobre el amor. Basado en 1 Corintios 13. Emocionante estudio del más clásico de los pasajes sobre el amor.

During the American Civil War, the United States was on the brink of falling apart irrevocably. As states seceded and brother turned against brother, hope for reconciliation was dim. This conflict, an essential topic of the social studies curriculum, is skillfully presented from its origins in the Southern slave-trade economy to bloody battles and, later, Reconstruction. Striking photographs and artwork of integral events and people will resonate with readers, while interesting sidebar information gives them more to reflect on about this terrible war and the lessons it taught us.

Excelente livro de histórias bíblicas infantis. Histórias de criação - Os patriarcas e suas histórias - José, o sonhador - Moisés, sua vida e sua obra - A conquista de Canaã Josué - Sanson, o invencível - O profeta Samuel, os primeiros reis