Cómo dibujar dinosaurios

La Química es una ciencia experimental. Trata de desentrañar los secretos de la materia en cuanto a su composición, propiedades y transformación. A lo largo de la historia, este estudio ha ido evolucionando desde la simple observación exterior hasta las sorprendentes teorías actuales sobre su naturaleza íntima. La Química actual es una ciencia básica para otras ciencias, constituye el fundamento de infinidad de análisis que se hacen en diagnósticos médicos, en criminología, en paleontología, etc., pero también es una ciencia que participa en la vida cotidiana (desde el aire que ...

Takes the reader on an imaginary trip through California while offering information about the history and geography of the major cities and towns.

Born into slavery, Frederick Douglass relied on his own determination and ingenuity to carve a path to freedom. Once free, he dedicated his life to improving the lives of others and fighting for justice and equality. This inspirational Spanish biography uses primary sources to engage students in learning about the fascinating life of Frederick Douglass. Students will build their literacy skills as they are immersed in social studies content. Text features include a glossary and an index to increase comprehension and academic vocabulary.

Memorial Day is an important and special holiday, but some people forget why we celebrate it. On the last Monday of May each year, people around the country gather and remember the men and women who've died while serving in the U.S. military. This educational book encourages readers to reflect on the sacrifices military personnel make to protect our country. This book also touches upon the more lighthearted side of the holiday and the different types of celebrations that people have each year. Featuring full-color photographs and accessible text, this book is sure to engage beginning readers.