La Sierra de la Demanda

El agua brota salvaje de los verticales paredones rocosos que ocultan, bien protegidos por la apretada sombra de dilatados y extraordinariamente bellos hayedos, el mundo mágico de las cuevas y txabolas que han cobijado a carboneros y pastores desde la historia, cuando concebían dólmenes y menhires bajo la aguda mirada de las águilas reales y los quebrantahuesos. Una apasionante mezcla de deliciosa riqueza natural y interesantísima huella humana que cautivará profundamente al viajeroen las cuatro estaciones.

Featuring TIME For Kids content, this Spanish resource, Empujar y jalar (Pushes and Pulls), aligns with NGSS standards to teach young learners about forces and interactions. The engaging photos encourage students to describe what is happening using their own words. This full-color, wordless picture book can be used in the classroom or at home to teach children the difference between pushing and pulling.

Interesting facts and experiments explore the dynamics of a race car engine to teach about air flow and drag, safety equipment and roll cages, the fuel system and horsepower, suspension and track bars, internal combustion, why race cars don't have speedometers, how roof flaps are designed like airplane wings, and more.

Examines The Properties Of Matter, The Use Of Energy From Gasoline Or Batteries, And Various Other Sources Of Energy.

Readers learn the basics of caring for common household pets, from physical features, to behavior, to diet. Also explored is how the animal's natural habitat differs from the habitat provided in the home.