Los estados de la materia — Los gases

Did you know that baby butterflies look like worms with legs? Caterpillars turn into butterflies inside a shell. Discover more about these flying insects in Butterflies, part of the Life Cycles series of EYEDISCOVER books.

Did you know that liquids take the shape of their containers? If liquids get hot, they can become gases. Discover more interesting facts in Liquids, part of the States of Matter series of EYEDISCOVER books.

Did you know that pigs are some of the smartest animals on Earth? Pigs keep themselves very clean. Discover more about these farm animals in My Pig.

Have you ever thought about how a soccer field is different from a football field? Or how a tennis court is different from a basketball court? Each sport has a surface with a purpose! Explore partitioned shapes with this Spanish math book that seamlessly integrates the teaching of math and reading, and uses real-world examples to teach math concepts. Text features include images, a glossary, an index, captions, and a table of contents to build students' vocabulary and reading comprehension skills as they interact with the text. The rigorous practice problems, sidebars, and math diagrams...

When a bird flies by a window or a car zooms by on the highway, we often wonder how fast the two objects traveled. This book explains the concept of speed to readers while showing them accessible ways to measure it for themselves. Learning the amount of distance traveled, and how quickly that distance was covered, is a great way to implement a variety of STEM topics while practicing this essential mathematical skill.

Este tomo de "Animales Salvajes" lo hemos dedicado a un grupo de aves que se distinguen de las demás por tener las patas y el pico muy largos. Son las aves zancudas, de las demás por tener las patas y el pico muy largos. Son las aves zancudas, de las que vas a conocer las especies más importantes (garzas, cigüeñas, pelícanos, espátulas, ibis, etc.), sus hábitats y sus costumbres. ¿Sabías que el ibis fue un animal sagrado del Antiguo Egipto?

Helps students successfully pass written and oral examinations, offering techniques for memorizing, creating, and summarizing all kinds of texts.