William Rice 
Ecosistemas [PDF ebook] 

Living and nonliving things live together in an ecosystem. To stay alive, all living things in an ecosystem need to live in balance. Learn about ecosystems with this Spanish science reader that features easy-to-read text and introduces students to important scientific concepts and topics. Nonfiction text features include a glossary, index, and detailed images to facilitate close reading and help students connect back to the text. Aligned to state and national standards, the book also includes a fun and engaging science experiment to develop critical thinking and help students practice what they have learned.