El Pacto Del Mayflower /

Defines pulleys, 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.

The Uses Of Wind Energy Is The Topic Of This Book. Explains The Positive And Negative Impact This Form Of Energy Can Have On Our World.

Un periodista investiga unos extraños asesinatos y descubre que están ligados a una profecía antigua de la cábala judía.

November 1940. A circus parade walks through the streets of Warsaw, waving a flag and singing. They are 160 Jewish children, forced by the Nazis to leave their beloved orphanage. It's a sad occasion, but led by Doctor Korczak, their inspirational director, the children are defiantly joyful. Their new home is in the ghetto, a prison for Jews. Two years later they board the train that will carry them away to the death camps. Offered his freedom, Doctor Korczak refuses to abandon the children and proudly joins them on their last journey. This profoundly moving illustrated book is based on the...

Animal trainers care for many different types of animals! Children will explore some of the methods that trainers use, such as affection bonding and classical and operant conditioning, while simultaneously gaining an understanding of animal instincts and animal rehabilitation. Readers are invited to learn about the variety of animals that trainers work with and are encouraged to find an area of study to focus on if they want to become an animal trainer. With stunning images, interesting facts, a glossary of useful terms, informational text, and an interview with a real-life animal trainer,...

La lluvia es un fenómeno atmosférico que consiste en la precipitación de gotas de agua. La intensidad de las lluvias se mide en milímetros de agua caída, es decir, la altura de agua caída recogida en una superficie plana y medida en milímetros. Un milímetro de agua de lluvia equivale a 1 litro de agua por m2, que es otra forma de medir la cantidad de agua de lluvia. Muy pronto va a llover y los niños están listos para explorar y averiguar todo lo que ocurre cuando las negras y amenazantes nubes se juntan. ¿Te has detenido a pensar de dónde viene la lluvia o adónde va?, ¿cómo se ...