how solid forms chapter 2 section 3 6 th grade team
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How Solid Forms
How Solid FormsChapter 2Section 36th Grade TeamStandardsS.6.6.b Students know different natural energy and material resources, including air, soil, rocks, minerals, petroleum, fresh water, wildlife, and forests and know how to classify them as renewable or nonrenewable. Anticipatory Set
VocabularyFertilitySoilHumus FertilitySoil horizon-AcidicBasicDecomposersSoil CompositionSoil is a mixture of rock particles, minerals, decayed organic material, water and air. NTGHumus- the decayed organic material that is soilIt is dark colored substance that forms as plants and animal remains decay. It contents nutrients and plants get their nutrients from this. As plants grow they absorb humus. NTGFertility- of soil is a measure of how well the soil supports plant growth. If it is rich is humus, it has high fertility. NTGSoil Texture Sand feels course, and clay feels smooth and silkyThe texture or particle size of soil determines how much air and water the soil can hold. Clay- has a dense, heavy texture and they hold a lot of water so pants grown in them can drown for lack of air NTGSandy- has a coarse texture and water quickly drains through it killing the plant from lack of water. NTGLoam- soil that is made up of about equal parts of clay, sand, and silt. NTG
Process of Soil FormationSoil horizon- a layer of soil that differs in color, and texture from the layers above it and below it. Horizon A- topsoil= a crumbly, dark brown soil that is a mixture of humus, clay and other minerals. Horizon B-Subsoil=consists of clay and other particles washed down from Horizon A but little humus.
Soil Types Scientists classify soil by its compositionAcidic- if a substance reacts strongly with some metals and changes blue litmus paper red Basic- if a substance feels SLIPPERY and changes red litmus paper blue. Scientists use the pH scale to measure acidic and basic substances. pHpH of 0= strongly acidic pH of 7= neutralpH of 14 = strongly basic
For plants to grow they need a pH of 6 or 7.5.
Living Organisms in SoilDecomposers are the organisms that break down the remains of dead organisms into smaller pieces and digest them with chemicals. NTGSoil decomposers- fungi, bacteria, worms, other organisms, mites and worms.Fungi- mold and mushrooms. They digest and grow on plant remains. Bacteria causes decay and attack dead organism and their waste in soil
Mixing the SoilAs Earthworms eat their way through the soil, they carry humus down to the subsoil and subsoil to the surface. Earthworms also pass out the soil they eat as wasteBurrowing animals- mice, moles, prairie dogs, and gophers break up hard, compacted soil and mix humus with it.
Checking for UnderstandingWhat is humus?What is a loam?What is a decomposer?Guided Practice Independent Practice Guided Practice NTG page 44 # 1-8
Independent Practice NTG page 45-46 # 9-23