El regalo de cumpleaños del abuelo (Grandpa's Birthday Present)

Wildlife scientists study animals and plants, and they learn about endangered animals and how to help save them. Many times animals are tagged to study them and track them. Dr. Ian Stirling studies polar bears and retrieves data by observing them throughout the year. Dr. Jane Goodall studied chimpanzees all her life and learned many interesting things about the way they live, which is much like humans. She believes that we can help animals and promote peace in the world.

Practice data analysis while learning about endangered species! This title allows young readers to improve their understanding of data analysis and graphing methods, teaching them about probability and STEM skills through bar graphs and pictographs. This book includes engaging examples of wild animals who are endangered species, teaching readers about their habitats, their greatest threats, and their predicted populations. Vibrant images, exciting examples, and clear mathematical diagrams and charts engage readers while making them more confident in their data analysis skills.

¿Qué es un “experimento mental”? Como nos dice Martin Cohen, «al igual que los que se realizan en el laboratorio, son pruebas que se conciben con el fin de explorar (o de destruir) las intuiciones que tenemos sobre el funcionamiento del mundo». Este libro imprescindible para todos los amantes del saber, desde los científicos a los filósofos, recopila los 26 experimentos de esta clase más interesantes realizados a lo largo de la historia. Y no es poca sorpresa, para empezar, enterarnos de que toda la ciencia moderna se sustenta sobre los modestos cimientos que establecieron media...

Readers will discover what you can do at a post office, such as buying stamps, checking a PO box, and sending a letter. This book's easy-to-follow narrative makes it perfect for beginning readers. A photo glossary offers new vocabulary, while a website link page suggests routes to more information.

Why do we need water to live? Find out in this informative title that explains the importance of water to all living things.

Sofía and her friends accuse someone of theft based on his appearance, but when the truth comes out, they learn a lesson about passing judgment based on superficial traits.