Lo Que Necesitamos Y Lo Que Queremos

Introduces different kinds of light, the properties of light, and how light can create shadows of different shapes and sizes.

"Simple text and photos present the seasonal weather cycle and activities to do in each season"--Provided by publisher.

The use of calendars dates back thousands of years. Why are we driven to record time, and what would happen if we did not? Who created the concept of calendars? Why do different cultures use different calendar systems? And why are calendars so important to us? It is about "time" we found out! Created in collaboration with the Smithsonian Institution, this Spanish-translated Smithsonian Informational Text builds reading skills while engaging students' curiosity about STEAM topics through real-world examples. Packed with factoids and informative sidebars, it features a hands-on STEAM challenge...

From the largest cargo planes and passenger jets to the smallest of single-engine crafts, airplanes are modern marvels. But just how do people build planes and what keeps them safe in the air? This exciting book takes readers inside the hangars where bolts and metal are turned into winged creations ready to take people all around the world. Amazing photographs show the aircraft construction process step-by-step, while engaging text gives a strong technical explanation of the science at work during every flight in this innovative STEM book.

¿Llevas años sufriendo cataclismos emocionales que te han dejado la autoestima por los suelos? ¿O por el contrario has tenido una sola relación pero con tantas broncas y reconciliaciones que has hecho tuya aquella frase de Catulo que dice «no puedo vivir ni contigo ni sin ti»? Pues éste es el libro que resolverá tus problemas emocionales... O casi.

Material didáctico, sencillo y práctico, estructurado en ocho ejes temáticos que recogen todos los elementos del sonido.