Many kids love to play in the dirt or grow plants in pots of soil, but how much do they actually know about what soil is made of and how it helps things grow? With this fun and fact-filled guide, readers get the dirt on dirt! They'll enjoy an introductory look at soil horizons, and learn how soil affects living things and how living things affect soil. Readers are given an up-close look through detailed, full-color photographs. Basic Earth science curriculum topics are presented in an accessible way that encourages independent learning.