Desarrollo Y Aplicacion De Un Indice De Calidad De… This investigation presents the development of a water quality index (WQI) for the rivers in Puerto Rico. This index intent to classify the water quality in a scale from 0 to 100 according to the evaluate constituent and this allow to classify the water according to its state, good, moderate,…
La Luz (light) Where does light come from? What do colors have to do with light? Light is a form of energy. Life on Earth is made possible because light from the sun carries heat to the earth. This book explores the essential concepts of light photons, color, refraction, light rays and waves,…
Sola Y Acompañada This book is about being independent and being in the company of friends. (Set of 6 with Teachers Guide and Comprehension Question Card)
Los Sonidos This book is about the different types of sounds and how sound is created. (Set of 6 with Teachers Guide and Comprehension Question Card)
