La compra de Luisiana (The Louisiana Purchase)

Swamps are one kind of wetland biome. Like other wetland biomes, a swamp’s water must be clean in order for the wildlife in it to thrive. Readers learn the main features of both freshwater and saltwater swamps, as well as where some of the biggest swamps are on Earth. Science curriculum topics such as food chains and conservation make the main content a great complement to classroom learning. Full-color photographs and inset maps aid readers in identifying this interesting biome in the world around them.

Presents a typical day of a bulldozer driver, with the safety equipment he puts on, the levers, beeper, and blades he uses in its operation, and what he does to get the bulldozer ready for the next day.

En medio de la naturaleza descansaba una piedra. Y la piedra era muchas cosas, dependiendo de quién la miraba y visitaba. Podía ser un refugio o esconder mortales peligros. Podía ser un lugar de reunión o un trono para sentarse. Podía ser infranqueable o insignificante. Pero lo importante es que ahí donde descansaba, pasaba la vida. En este álbum ilustrado que recuerda a autores como Lane Smith o Philip C. Stead, Brendan Wenzel permite que la naturaleza fluya alrededor de una única piedra y convierte su poema en una pasarela exquisita de animales, plantas, estaciones y cambios de...

In this stimulating, Spanish-translated nonfiction book, readers will discover the various types of friction--including rolling friction, sliding friction, fluid friction, and static friction--and the huge impact it has on nature, machines, and our lives. In addition, readers are encouraged to perform basic experiments to assist in the understanding of friction, kinetic energy, and water resistance. With real-life examples, colorful images, accommodating graphs and charts, and informational text, this title will inspire and engage children.

Blobfish, pangolin, and flower mantis are just a few of the names of the bizarre bugs and animals that readers will learn about in this fascinating, Spanish-translated nonfiction title. Through vibrant images and photos, informational text, a glossary of terms, and an index, readers will learn some of the strange ways that arthropods, invertebrates, and mammals have adapted over time to camouflage themselves and develop interesting ways to keep predators away.