Abraham Lincoln

Esta excelente biografía del célebre químico francés está dirigida especialmente a los lectores jóvenes y presenta los logros más significativos de este importante científico. Él realizó investigaciones decisivas sobre la fermentación y las bacterias, sostuvo que los gérmenes eran los responsables de las infecciones y desarrolló el proceso de la pasteurización, de enorme importancia para la economía y la salud pública. Además, descubrió las vacunas contra el ántrax y la rabia. También fue el primer director del Instituto Pasteur, fundado en 1888 para investigar los virus y ...

Define planos inclinados, explica sus funciones, y sugiere experimentos sencillos para demostrar cómo funcionan.

Follows The Thirteenth Amendment That Freed The Slaves, The End Of The War, And The Death Of President Abraham Lincoln.

This inspiring biographical series ties in with elementary history, science, and social studies curricula, providing teachers with a valuable interdisciplinary resource. With these books, young readers will discover historical figures who devoted their lives to making the world a better place, and changed the course of history. Text copyright 2004 Lectorum Publications, Inc.

Each player has his or her own job in soccer and baseball. They each do their part to contribute to the team. Teamwork is also important outside of sports. We use teamwork in our classroom, in our community, and at home with our family. Readers are presented with different scenarios in which young people use teamwork to achieve a certain goal, like when Nicole's neighbor becomes ill, everyone in the neighborhood takes on a job with the goal of helping the sick neighbor. Each spread contains a color photograph that imparts the importance and rewards of working as a team.

Este libro oficial de Minecraft contiene el conocimiento colectivo de los supervivientes, un grupo encubierto de expertos cuya existencia data de los días del alfa.Quizá te preguntes por qué nunca escuchaste acerca de nosotros. Pues porque somos así de buenos, El engaño es nuestro segundo nombre. Somos invisibles a menos que queramos ser vistos. Nuestros éxitos son impresionantes: hemos combatido a mobs del mundo real, lidiado con facciones enemigas, instalado bases en el Inframundo, y hemos derrotado al dragón del End en múltiples ocasiones. Estudia este libro con atención y quizá...

It doesn't take a lot to conserve electricity. Taking action can be as simple as turning off the lights when you leave a room or using "people power" instead of cars to get around. Kids learn this and more about what they can do to help in 10 Things I Can Do to Save Electricity. Now in Spanish.

"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 the film Jurassic Park. Take a trip through dinosaur time to meet these deadly dinosaurs face-to-face: The Variraptor had pointy teeth with grooves like steak knives to saw through meat! The Draeomaeosaurus was the first raptor ever discovered. It had a very large brain! The Microraptor was ...