Introduces different natural areas with distinctive climates and life forms, including forests, deserts, grasslands, tundra, mountains, and oceans, and suggests related projects and experiments. Build It Yourself Series Interest Level: 5-8 Reading Level: 7.8 Lexile Measure: 940 Guided Reading Level: R. Teaching Books: https://school.teachingbooks.net/tb.cgi?tid=17336.