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Transcript
Name: ______________________________________________________ Highlight the key words in each definition and draw a picture that represents each word. Soil Parent rock The loose mixture of small mineral fragments, organic material, water, and air that can support the growth of vegetatio A rock formation that is the source of soil Bedrock The layer of rock beneath soil made up of unweathered rock Soil texture The soil quality that is based on the proportions of soil particles Humus The dark organic material formed in soil from the decayed remains of plants and animals Leaching The removal of substances that can be dissolved from rock, ore, or layers of soil due to the passing of water Soil conservation A method to maintain the fertility of the soil by protecting the soil from erosion and nutrient loss Horizon is a layer parallel to the soil surface, whose physical characteristics differ from the layers above and beneath Leaves and other organic matter that breaks down into humus Litter Horizon A Horizon B Horizon C Horizon R also known as topsoil. This is the layer where most plants grow. Leaves and other organic material fall to the ground becoming litter. This litter eventually breaks down and becomes humus. Humus is the decayed organic material that makes the soil so fertile. The layer directly below Horizon A and is also known as subsoil. Subsoil could eventually become topsoil through the process of leaching. Leaching is the process where water carries nutrients from the top soil to the subsoil. The layer of soil that consists of partly weathered rock. This layer is also known as bedrock which consists of rock that has gone through little to no weathering. Name: ______________________________________________________ Highlight the key words in each definition and draw a picture that represents each word.