César Chávez

Diecisiete descubrimientos asombrosos que fueron claves y que marcaron el rumbo de nuestra historia. La mayoría de los hallazgos arqueológicos ocurren después de meses o años de investigación minuciosa y trabajo meticuloso..., pero a veces solo hay que estar en el lugar correcto en el momento adecuado para descubrir algo asombroso, ¡por casualidad! Este libro es una aventura en la que reviviremos algunos de los descubrimientos más sorprendentes y extraordinarios con los que se toparon personas normales y corrientes de distintas partes del mundo. Desde el hallazgo de Herculano a...

There are many steps in the nitrogen cycle that include difficult concepts and words: denitrification, prokaryotes, ammonia, and more. With the help of this understandable book, even struggling readers will grasp this cycle of nature. Low-level language, fact boxes, and an extended glossary provide readers with essential vocabulary explanations that allow them to further understand each step of the cycle. Full-color diagrams aid readers' comprehension as they move through the cycle from start to finish, and then around again.

Young Readers Will Identify That Goods Are Objects And Services Are Activities That Can Satisfy People's Wants.

There are many types of weather. Different types of weather make us feel different things. This Spanish book introduces students to the concept of weather. With images that are easy to identify and clear, simple sentence structures, this science reader simplifies scientific concepts for young students as they improve their reading skills. A fun and easy science experiment and Your Turn! activity provide more in-depth opportunities for additional learning. Nonfiction text features include a glossary and an index. Engage students in learning with this dynamic text!