¿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.

«Si buscas personajes incansables y entretenimiento al cien por cien, necesitas leer a Parker.» JANET EVANOVICH Cuando April Kyle, serena, madura y guapísima, entra en el despacho de Spenser, el detective tarda unos minutos en reconocer a su antigua cliente. Convertida en madame y bien situada, ahora April gestiona una empresa de prostitutas de lujo en el barrio bostoniano de Back Bay. Su negocio, en el que sólo participan mujeres, parece prosperar, pero sus problemas empiezan cuando unos hombres quieren arrebatárselo. Años después de haberla ayudado a empezar una nueva vida, Spenser...

For thousands of years, militaries around the world were limited to male soldiers. However, throughout history, brave women have stepped out of the background and onto the battlefield. This biographical text covers the important women who’ve broken ground in the military. Famous historical figures such as Joan of Arc, Clara Barton, and Florence Nightingale are covered in depth, while the stories of modern-day heroes are presented to show how women are still affecting change on the front lines. A comprehensive timeline, fact boxes, and historical and modern images complete this...

Provides a basic introduction to caves, including geographical information and plant and animal life.

Take a virtual tour of the National Museum of Natural History with this high-interest STEAM book! Along the way, learn about the challenges that museums face when designing fossil exhibits. You’ll also learn how studying fossils helps scientists learn about prehistoric species such as dinosaurs and their habitats. Created in collaboration with the Smithsonian Institution, this Spanish book will ignite a curiosity about STEAM topics through real-world examples. It features a hands-on STEAM challenge that is perfect for makerspaces and that guides students step-by-step through the engineering...