An ecosystem is an area that has its own plants, animals and weather. Desert, forest, grassland, mountain, tundra and marine ecosystems are pictured and the animals and plant characteristics of each ecosystem are briefly discussed. This nonfiction Beginning-to-Read book contains high-frequency words and content vocabulary. Connecting Concepts pages include a word list along with activities to strengthen early science and literacy skills, such as understanding nonfiction text, science in the real world, science and academic language, fluency, and finding further information. Aligns with Next Generation Science Standards for Grades K-3.