Soil is just rock that has been eroded. Erosion is when wind, water, or other natural agent wears away at rock and takes it to a new place. This take millions of years to happen. As the wind or water etches away at the rock, the pieces of soil or rock that come off get carried to someplace new. Soil is not just these rocks and minerals, but is also has organic or living things in it. It has tiny fungi and bacteria and lots of nutrients. These nutrients, like nitrogen or phosphorus, get deposited into the soil because of the decomposition or breaking down of dead plants and animal waste. This is what soil is! You can learn more about soil by checking out our episode called “Soil! Can you dig it?“.