Investiguemos las fuerzas y el movimiento (Investigating Forces and Motion)

Wind Power: A waving flag, blowing leaves, a kite soaring through the skyall are moved by wind power. Wind is also our fast-growing source of energy. Find out how wind forms and the different ways we may use it in the future.

CIVIC COMPETENCIES - Reflection, decision, action - What education do we want for this moment and for the future for citizens? The building of a viable future in which democracy, equity, social justice, peace and harmony with our natural environment, and the ethic of responsible citizenship are shared values, passes today as education for citizenship, a project that has as a horizon, the formation of responsible and free persons to engage in democratic processes with a new ecological, peaceful reasoning, inclined to solidarity, called to construct the value of the different and to be...

Algorithms might sound like a complicated tech term, but don't be intimidated, people actually use them every day. Using accessible language and full-color photographs, this book simplifies algorithms in an easy-to-understand way. Readers will be amazed to learn that an algorithm is just a set of steps for computers to follow to get things done. STEM topics from the Next Generation Science Standards are emphasized throughout the text. Sidebars featuring key terms help readers grow their tech vocabulary, and fact boxes provide additional opportunities to learn.

El Mal asola al ser humano desde que Pandora, la muñeca autómata fabricada por los dioses y diosas del Olimpo, abrió el recipiente que llevaba cuando fue remitida a los hombres de parte de Zeus para castigarles por la insolencia de Prometeo, que decidió robar el fuego para dárselo a los hombres. Como el genio de la lámpara de Aladino, el Mal debió de exclamar: «¡al fin libre!» Y a partir de ese momento emprendió su trabajo por todos los rincones de la tierra, irradiando locura, guerras, enfermedades, peste, crímenes, perversiones... a gran escala, pero también a la medida del...