Estudiamos la temperatura: Organizar los datos (We Study Temperature: Organizing Data)

What has a head, two tails, and shoots across the sky? A comet. Coming from the far edges of the solar system, most comets travel around the Sun, while meteors appear as flashing streaks of light in the night sky. Explore these amazing celestial wonders as they zip through space! This book looks at the difference between comets and meteors and their effects on Earth. The physical characteristics of each are identified in detail. This book won’t come crashing down! It’s filled with fun facts that give additional information on this exciting science topic. This book allows students to use...

Many animals live in water, but only some can be defined as fish. Twenty-eight thousand species of fish exist, each with different characteristics. Readers from grades one through four will learn that fish have a distinct impact on their ecosystem and will see how fish survive when well-adapted to an uncompromised environment. Beautiful photographs demonstrate the great diversity of fish and accompany intellectually stimulating explanations of their varying roles and traits. From page to page, what a fish is unfolds in vocabulary call-outs, insightful questions, and relatable...

¿Qué quiere ser cuándo crezca? En Cuando crezca, descubrirá cuantas cosas diferentes podrá hacer! (What do you want to be when you grow up? In Cuando crezca, you will discover just how many things you can be!) A little boy explores being a doctor, dentist, singer, fire fighter, pilot, teacher, construction worker, cook, famous baseball player and more in this adorably-illustrated book. At the end of the day, he still can’t decide because he’s only 7! Cute text, coupled with beautiful watercolor art, illustrates each occupation in a fun, child-like way. Learn simple English words and...

Se desarrolla, paso a paso, el calculo de 26 problemas de navegacion astronomica, ortodromica y cinematica naval para el interesado en situarse durante la navegacion oceanica mediante las referencias que ofrecen para ello los astros del firmamento. Sin duda la "navegacion a la antigua" debe ofrecer al interesado diversion y entretenimiento y no ser una tecnica cotidiana de navegacion, pues para ello se ejecuta en la actualidad una sofisticada navegacion instrumental.Se corresponde el contenido del libro con el temario actual de las asignaturas de calculo y navegacion para aquellos marinos que ...