Los estados de la materia — Los gases

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.

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.

As a successful former slave, Clara Brown used her money to help other freed slaves get a new start in life. In 1859 Clara bought her own freedom and headed west to Colorado to find her daughter, who was sold when she was just a little girl. Clara didn't find her daughter there, but she did get rich. The people she helped became her family, and she became known as "Aunt" Clara Brown.

The second edition of Cinema for Spanish Conversation includes the same stimulating exercises and conversation materials that have made the first edition a success among students and instructors alike. The text is designed to be used in courses in which outstanding films from the Spanish-speaking world are used as springboards for classroom Spanish-language discussion. Using high-interest feature films, students hear Spanish as it is spoken in different countries and in a wide variety of situations and are encouraged to listen to and converse about the social and cultural aspects of...

¿Cómo te sientes hoy? Aprender diferentes sentimientos es fácil y divertido en el libro A Veces me siento/Sometimes I Feel. (How do you feel today? Learning about different kinds of feelings is easy and fun in A Veces Me Siento). Young readers will realize that all the different feelings they experience throughout the day are common! From feeling happy to sad, to silly or mad, cute illustrations demonstrate different feelings in an appropriate way for young children. Simple sentences will have young learners reading along in no time. Learn simple English words and phrases with the...

When we look up at the night sky you can see millions of stars, but what do you think we could see in space if we left Earth? If we could hop into a special ship and blast off, traveling billions of miles away from Earth, we’d see the Milky Way galaxy. In this book, readers take an incredible journey through that galaxy, exploring the universe and learning how it was formed and what will one day happen to these enormous groups of stars. From mysterious dark matter to the black holes at the center of galaxies, readers will also dive into the mysteries of the universe scientists have spent...