El mundo de la tecnología: Los inventos del siglo XX (Tech World: 20th Century Inventions)

Muddy Creek in Edgewater, Maryland is the site of a major makeover. The land around the stream has worn down. Find out what caused Muddy Creek to erode, and the many steps involved in saving it. Created in collaboration with the Smithsonian Institution, this Smithsonian Informational Text builds students' reading skills while engaging their curiosity about STEAM topics through real-world examples. It features a hands-on STEAM challenge that guides students through every step of the engineering design process and is perfect for makerspace activities. It makes STEAM career connections by...

Uncover some of the most infamous disasters in the world including the Hindenburg, the sinking of the Titanic, the Dust Bowl, BP oil spill, the Hiroshima and Nagasaki atomic bombs, and the Chernobyl disaster in this shocking book. With its intriguing facts, vivid images, helpful graphs and maps, and informational text, this fascinating, Spanish-translated nonfiction title will keep readers informed, engaged, and interested from cover to cover.

¿Existieron de verdad, en un tiempo lejano, los dragones voladores, los grifos dorados, los unicornios mágicos, los gigantes y las sirenas? ¿O acaso estas criaturas misteriosas son producto de la imaginación de nuestros antepasados? En las páginas de este libro nos convertiremos en auténticos paleontólogos y rastrearemos los valiosos indicios que se esconden en los fósiles de los animales prehistóricos más extraordinarios. Un recorrido apasionante para conocer más sobre los dinosaurios, paquidermos, moluscos y reptiles acuáticos que poblaron nuestro planeta hace millones de años, ...

Readers are given helpful information about the dangers of drugs and alcohol, including narcotics, hallucinogens, and prescription medications in this informative nonfiction reader. Through detailed images, diagrams, Spanish-translated informational text, an index, a glossary of terms, and a list of websites that provide additional information, readers are given the tools and information they need to educate themselves about addiction, drug abuse, the health and social issues that drugs and alcohol can cause, and how to say no to peer pressure.