It's time to get those hands dirty and learn about soil - one of our precious resources on planet Earth! A knowledge of soil helps build sustainability skills and knowledge, as well as growing those important observation and data collection skills in science. Find out about erosion, soil composition, pH and farming practices as you work through the cards. Cut out the question cards and give one to each student or group. See how many cards can be answered correctly. Provide the answer cards to see if students can solve the question using the clues provided.