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Soil Composition SSS

Act 5 and Act 6

What is weathered rock? Weather breaks down rock into very tiny pieces that makes up soil.
Name the type of soil that has the largest pieces of weathered rock. Sand
Name the type of soil that has the medium sized pieces of weathered rock. Silt
Name the type of soil that has the smallest sized pieces of weathered rock. Clay
The wearing down of rocks by natural forces is called... weathering
What are the two main ingredients in soils? Weathered Rock and Organic Matter
Which type of soil will water flow through the fastest? Sand
Which type of soil will hold the water the longest? Clay
Which type of soil will probably only need water every 3 days or so? Silt
Where does organic matter come from? decomposed plants and animals
What does decomposed mean? living things that die and then are broken down into their smallest parts.
What are nutrients? chemicals that can dissolve in water and be absorbed by plants.
Why do plants need nutrients from the soil? So that they can grow.
What is the cycle of nutrients? How a decomposed plants leaves nutrients in the soil that helps another plant grow.
Soil can be found in layers. What is the top layer? Top soil
What is special about the top layer of soil? Contains most of the organic matter.
What is the 2nd layer of soil? Subsoil
What is the 3rd layer of soil? Parent material
What is the bottom layer of soil? Bedrock
What are we testing when we identify the consistence of a soil? How easily the clumps are broken apart.
What do we mean when we say the consistence is friable? If the soil breaks apart with a small amount of pressure from one finger.
What do we mean when we way the consistence is firm? If the soil breaks apart with a lot of pressure from two fingers.
When are we testing when we identify the texture of soil? Texture describes the size of the particles.
What three things would we feel when we rub the soils between our fingers to determine texture? Grainy: feels gritty Silky: feels powdery Sticky: feels gummy
Which soil would be better for the school garden? the soil from Phoenix AZ, or the soil from Orlando, Fl? Orlando Fl.
Created by: stoth