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Over the years, people have looked for ways to improve our imperfect sight. This has led us to the world of optics, which is the study of light and how it travels. What are some of these innovations that have changed how we see the world, and how do they work? Find the answers to these questions with this Smithsonian Informational Text! Created in collaboration with the Smithsonian Institution, this text builds students' reading skills while engaging their curiosity about STEAM topics through real-world examples. It features a hands-on STEAM challenge that guides students through every step...

Simple text and photographs introduce the concept of symmetry as displayed by familiar creatures and objects.

Diamonds and salt are both minerals, but diamonds are more rare than salt. Curious readers will learn what physical and chemical conditions must be present for minerals to form. They'll discover how minerals are identified and how they are used in daily life. Informative and interesting text presents readers with this science content in a fun way. A graphic organizer shows how different minerals are identified and fact boxes provide readers with exciting supplementary information.

El presente libro se orienta a profundizar en los conocimientos sobre el proceso de producción escrita y a apoyar la labor creadora de la palabra con la perspectiva de producir textos que puedan convertirse en libros. El autor ha recogido sus experiencias relacionadas con la composición escrita de sus libros, para compartirlas con quienes tienen el oficio de jugar con las palabras, las ideas y los textos o de pronto están por escribir una obra científica, expositiva, divulgativa, literaria o de cualquier otra índole. Concibe el escribir como un acto creador de la mente, el cual incluye...