¿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.

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.

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.

Lightyear es la nueva película de Disney y Pixar sobre el origen de Buzz Lightyear, el héroe que inspiró el juguete. Se trata de una historia de ciencia ficción llena de acción y aventuras. Antes de que Buzz se convirtiera en el Guardián Espacial que todos conocemos, era un joven en una misión audaz y peligrosa. Viaja al infinito y más allá con esta novela que cuenta la historia de la película y contiene ocho páginas a color con datos sobre todos los personajes ¡y un póster!

Surveys the life of Nathan Hale, a Revolutionary War hero whose service to George Washington as a spy cost him his life.

Suggested age: 4 years old. Thirteen poems for the very young. As everyone knows, anything can happen in the world of poetry: the elephant has gray secrets, ships sail in a sea of sawdust, two saws dance tango together.

16 vidas extraordinarias de personas que luchan cada día por salvar el medio ambiente. 16 historias para los pequeños héroes que salvarán nuestro planeta. ¡Somos la última generación que puede cambiar el mundo! Nunca se es demasiado jóven para salvar el mundo. Este es el mensaje que transmiten los 16 cuentos de este libro. 16 vidas extraordinarias de personas que luchan cada día por salvar el medio ambiente. 16 historias para los pequeños heroes que salvarán nuestro planeta. De Leonardo di Caprio a Emma Watson, pasando por supuesto por Greta Thunberg o Pierre Rabhi (considerado...