Ciencias de la Naturaleza 1o ESO. Libro del profesor

¿Por qué los limones amarillos flotan y los verdes se hunden? ¿Se pueden limpiar monedas con un limón? ¿Cómo puedo escribir un mensaje secreto con su jugo? Estas preguntas y muchas más encuentran su respuesta en este libro de actividades alrededor del limón. Cada doble página propone experimentos con materiales comunes en la cocina que llevarán al lector a descubrir conceptos como las partes de un limón, las reacciones químicas que hacen que el calcio se disuelva o que se corte la leche, sus propiedades antioxidantes o cómo exprimirlos mejor. Así, este sencillo texto,...

Describes Formula One cars, including their design, features, and races. Written in English and Spanish.

Having a job and earning money are a part of everyday life for most people, especially adults. The concept seems fairly straightforward: one works to earn. This volume discerns the difference between a job and a career, as well as how a job can develop into a career. Readers will learn why a community's economy needs jobs, how paying someone to do a job helps the person who is paying them, and even about job loss and its consequences. The text also explains different jobs and their effects on the economy, such as those of professional, production, arts, and government and military jobs.

This book is a comprehensive, practical presentation of the principles of behavior modification and guidelines for their application. It teaches forms of behavior modification ranging from helping children learn necessary life skills to training pets, to solving personal behavior problems.