Energía del viento

Defines screws, explains their functions, and suggests simple experiments to demonstrate how they work.

Defines levers, explains their functions, and suggests simple experiments to demonstrate how they work.

Follows the life and career of the French scientist who proved the existence of germs and their connection with diseases.

“Dino” Don Lessem brings readers face-to-face with various dinosaur species, detailing their habitats, way of life and how they became extinct. An acclaimed dinosaur expert, Don Lessem has written more than 30 children’s books, writes a popular dinosaur column in Highlights magazine, and was an adviser for Jurassic Park. Take a trip through dinosaur time to meet these small dinosaurs face-to-face: Little Lesothosaurus was the length of a house cat! Epidendrosaurus could climb into trees like a squirrel! Liaoceratops had body armor and horns-and was only the size of a collie dog! Plus,...

Why do continents matter? From economics to weather science—and everything in between—knowing the characteristics of the continents expands readers’ perspectives in every school subject. This fundamental information is a building block of many future lessons and an essential part of elementary education. This book presents a focused, clear, age-appropriate look at Earth’s continents that young readers are sure to find both informative and interesting. This volume is also packed with colorful maps that are labeled and explained to foster young readers’ comprehension of this important...

After the death of his uncle, Poldo describes growing up, his close relationship with his uncle and how he deals with the sudden loss.

Seguro que has escuchado hablar de sor Juana Inés de la Cruz, pero ¿sabes cómo se convirtió en la Décima Musa? En una hacienda a la falda de los volcanes, Juana Inés vive con su entrañable abuelo, su madre y su querida hermana Josefa, rodeada de libros y siempre acompañada por su perro xoloitzcuintle. Pronto Juana Inés se enamora del maravilloso mundo que se esconde detrás de las letras y, al pie de la pintura de la virreina, escribe los más hermosos poemas. Descubre cómo fue la niñez de sor Juana Inés de la Cruz, ¡la poeta más destacada que dejó Nueva España!