This 35-page science mini-book was created to help teach the Next Generation Science Standards for 3rd grade Life Science: 3-LS1 (From Molecules to Organisms), 3-LS2 (Ecosystems), 3-LS3 (Heredity), and 3-LS4 (Biological Evolution). It covers the following principles: what is an organism, what is a life cycle, animal & plant life cycles, what is survival, safety in numbers, what is a habitat, what are adaptations, what is natural selection, what does endangered & extinct mean, what are fo