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Science Starter 4/10

Science Starter 4/10. True or false Ice wedging only occurs in winter. The layers of soil are called horizons. The darker the soil the less organic matter it in it. Humus is a man made, non-organic matter that is in soil. Soil profiles all over the world are the same. Answers. FALSE TRUE

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Science Starter 4/10

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  1. Science Starter 4/10 True or false Ice wedging only occurs in winter. The layers of soil are called horizons. The darker the soil the less organic matter it in it. Humus is a man made, non-organic matter that is in soil. Soil profiles all over the world are the same.

  2. Answers FALSE TRUE FALSE FALSE FALSE

  3. Foldable wordsPicture, Definition, and example Chemical weathering Mechanical weathering Humus Soil Horizons Texture of soil Pore Space of soil

  4. Stop Treating Soil Like Dirt! Let’s explore this very important part of your life.

  5. What is Soil? • Soil is a mixture of four materials: • Weathered rock • Organic matter (remains of plants and animals) • Water • Air

  6. Soil Components Organic Matter (leaves, plant roots, etc) (~5%) Air (~25%) Rocks(Minerals) (~45%) Water (~25%)

  7. Q: What’s the difference between soil and dirt? A: Location, location, location! • Dirt is what you find on the floor. • Soil is what you find in the ground (the top layer of the Earth’s surface).

  8. Why the color? http://www.cs.cmu.edu http://www.msstate.edu http://www.mii.org Hematite: red Goethite: yellowish brown Ferrihydrite:reddish brown http://www.beg.utexas.edu http://www.pitt.edu http://www.organicgardeninfo.com Calcite: off white Quartz:white Organic matter:black

  9. Soil Color by Horizon A horizon: organic coatings B horizon: Iron coatings C horizon: little coating http://nesoil.com

  10. Soil Color Variation

  11. Soil Color – Variation by Geography Red soils: Southeast US

  12. Soil Color – Variation by Geography Brown/black soils: Midwest

  13. Soil Color – Variation by Geography White (gypsum) sands: New Mexico http://www.scienceclarified.com

  14. Soil Size http://school.discoveryeducation.com

  15. Fine Texture - Clay https://www.soils.org/lessons

  16. Course Texture - Sand https://www.soils.org/lessons

  17. Fun Fact: There are over 20,000 different soil types of soil recognized in the US alone!!!! Thien, 1979

  18. The kind of soil that forms in an area depends on MANY factors, including: • The kind of rock in the area • The area’s climate • The landforms in the area (mountains) • Time • The animals and other organisms in the area The kind of soil determines what you can grow in it, what you can build on it, and what happens to therainwater that falls on it.

  19. Does the Type of Soil Matter? Yes!! Some soils are stronger for buildings, some hold nutrients better.

  20. Without soil, there would be no jeans. That's right! Jeans are made of cotton denim stitched together with cotton thread. Their blue color comes from indigo dye. Cotton and indigo come from plants that need soil to grow.

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