¿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.

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.

Book Features: • Ages 5-8, Grades K-2 • 24 pages, 8 inches x 8 inches • Simple, easy-to-read pages in Spanish with full-color pictures • Includes a photo glossary and a reading extension activity • Supports NGSS Dive Into Learning: In Mi Biblioteca de Ciencias de la Tierra y el Espacio: Una Excursión por la Tierra, kindergarten—second graders learn about all the different landforms on Earth and the forces that create them. Science Learning Made Fun: Earth’s surface has mountains, plains, canyons, and many other formations. Young readers learn about all the different landforms...

This second volume of Obras de teatro infantil presents comedies of love, fear, adventure and absurdity to be read and performed by children both at school and at home.

A picture-book biography of St. Pedro Claver (d. 1654), a Spanish Jesuit missionary to the New World, who is the patron saint of slaves.

Besides oil, Texas has long been associated with cattle and agriculture. Learning about these industries will allow readers understand how valuable their development is to the growth of the state of Texas, as well as America's economy.