Experimentos con la luz

¡Ponte a prueba con cientos de adivinanzas superdivertidas! Un simpático libro lleno de humor y color para que toda la familia, sobre todo los pequeños, llene las horas con ingenio y diversión. Incluye las soluciones al final y unas originales ilustracion

Defines pulleys, explains their functions, and suggests simple experiments to demonstrate how they work.

In 1862, the American Civil War was underway, actively tearing the United States apart. At the start of the war, President Abraham Lincoln's main goal was preserving the Union, but he was now ready to make a stand on slavery. The Emancipation Proclamation was one of the most important documents of its time, but its contents can be confusing. This volume gives readers context for the proclamation, as well as explains what it says and its results, in uncomplicated language appropriate for those reading below level and those looking for a review of this subject.

Introduce diferentes culturas alrededor del mundo contando historias de paredes, desde los murales Mayas en Bonampak, México, hasta la Muralla del norte de Inglaterra.