According to HGTV, it takes at least 500 years to make just 1 inch of topsoil, and there are more living organisms in just 1 tablespoon of soil than there are people living on the planet. Some of the soil on Earth is sta... More »

One good soil fact for kids is that there are actually different types of soil, including histosols made of organic material, andisols made of volcanic ash, and mollisols found in grasslands. Vertisols are clay soils tha... More » Science Earth Science Soil

Rock is the primary component of the Earth's crust. Although soil, sand and other natural materials are similar to rocks, they are not actually rocks and are classified as derivatives of rocks. Minerals are necessary to ... More » Science Earth Science Geology

Many factors can affect how long it takes for an inch of topsoil to form, but it normally takes at least 100 years and often over 500 years. The factors that affect soil formation are parent material, topography, climate... More »

The distinct soil layers, or horizons, are organic matter, humus, topsoil, the eluviated layer, subsoil, regolith and bedrock. The main horizons are also referred to as master horizons and are often designated and recogn... More »

The presence of air in soil ensures that aerobic soil organisms have the oxygen required for metabolism. Many soil organisms require oxygen, including plant roots, insects and microorganisms. When soil is not aerated, th... More »

Soil is not a renewable resource, but a non-renewable resource, because it takes up to millions of years for soil creation. The breaking down of rocks and other matter is responsible for the creation of soil. Soil is non... More »