¿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.

This guide lays the groundwork for making well-conceived manga characters and comics. It starts with gathering the correct materials and supplies with tips on using them effectively.It goes on to show how to create different types of manga; drawing people and animals; the use of various manga techniques and effects; how to depict nature, props, weather, vehicles, buildings and the use of perspective; panel design and composition; and several in-depth discussions that explain the finer points of some techniques. A great overview into the world of manga comics that is clearly presented for the...

Internet security breaches have been in the news of late. Organizations, governments, businesses, and individual internet users are all at risk. This book introduces readers to the importance of cybersecurity and addresses the current risks from hackers, viruses and other malware, identity thieves, and other online perils. It provides concrete measures that young digital natives can take to protect themselves and their computers, smartphones, and other devices. This volume's lively, cautionary narrative and useful tips will help readers effectively defend their identities and data.

Descubra por qué Selena, la reina de la música tejana, ¡se convirtió en una de las artistas méxico-americanas más célebres del siglo XX! Discover why Selena, the Queen of Tejano music, became one of the most celebrated Mexican-American entertainers of the twentieth century in this Spanish edition of the WHO HQ series! De joven, Selena Quintanilla cantaba en un grupo llamado Selena y Los Dinos con su hermano y su hermana. La familia actuaba en ferias, bodas, fiestas de quince años y en las esquinas de su Texas natal. Selena aprendió a cantar en español y pronto se hizo muy popular...

"Los perros en mi vida" captura el amor y la calidez compartida entre la Maestra Suprema Ching Hai y sus numerosos perros con fotos a todo color y leyendas poéticas escritas desde el punto de vista de los caninos. La Maestra Suprema Ching Hai había estado compilando estos conmovedores cuentos de perros desde que comenzó a adoptarlos, uno tras otro, de los refugios en 2001. Fue un viaje milagroso para estos perros en su renacimiento a través de su compasión. Los lectores de este libro verán a los perros bajo una nueva luz: ¡seres nobles con mucho amor!