Conservación de la masa (Conservation of Mass)

Light can travel faster than anything else in the universe. But what exactly is light, and where does it come from? This nonfiction Spanish book teaches students all about light, and introduces them to important scientific concepts and vocabulary terms like infrared, ultraviolet, photos, and visible spectrum. The intriguing images, detailed diagrams, and stimulating sidebars will keep students connected to the text. The fun lab activity provides a real-world learning experience that supports STEM instruction. Aligned to state and national standards, the leveled text supports differentiation....

Readers will set their eyes to the night sky in this fascinating book about astronomers. This volume is a perfect combination between STEM and career guidance as it introduces readers to the different ways astronomers use science, technology, engineering, and math in their work every day. Readers will love learning about celestial bodies and space phenomena, as well as the different processes and equipment astronomers use to observe, collect, and analyze data. This book also covers the steps a person can take to become an astronomer. The curriculum-based information in this book is conveyed...

Sonia y sus amigos siembran un jardín, y cada uno contribuye a su manera. Rafael tiene asma y a veces debe mantener la calma para poder respirar mejor, lo que le permite pintar bellas rocas para el jardín. Anthony utiliza una silla de ruedas para moverse rápidamente y dirigir al grupo. Anh tartamudea al hablar y prefiere escuchar. Por eso sabe cómo sembrar cada flor. Todos los amigos son diferentes, pero todos tienen algo en común: ¡les gusta hacer preguntas y saber más acerca de sus compañeros! En esta tierna historia que refleja la diversidad, escrita por Sonia Sotomayor, juez del...

La Asociación Española de Sexología Clínica ha escrito los textos de esta colección con el fin de responder a la curiosidad de los niños y enseñarles de una forma natural, adaptando cada cuestión a su edad y explicando las cosas de un modo sencillo, aunque riguroso, acompañado además de graciosas ilustraciones. Este libro aborda las relaciones sexuales y afectivas de la pareja, el proceso de fecundación, así como los métodos anticonceptivos.

SHAAAARRRKK! That's probably the last word anyone wants to hear while swimming in the warm blue sea. But most sharks aren't at all what people expect. In fact, those who think all sharks are giant, man-eating killers are in for a surprise. The compelling narrative, colorful illustrations, and captivating facts in SURPRISING SHARKS reveal that sharks come in all shapes and sizes - and probably should be more afraid of humans than we are of them. Back matter includes a note about sharks and an index.