just study
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is evidence? | unbiased data gathered by direct observation
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| What is soil? | portion of earth's surface of rock and humus which helps plants grow
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| What is composition? | specific ingredients- general make-up of a material
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| What is weathering? | wearing down of rocks by natural processes
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| What is decomposing? | break down or decay living material
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| What is organic matter? | material living organisms: plants, animals, leaves
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| What are nutrients? | dissolve in water and are all absorbed by roots and is a certain
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| What is humus? | rich topsoil that forms after decomposition, a good loom soil with 40% silt, 40% sand, and 20% clay
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| What is fertilizer? | substance that supplies the soil with missing nutrients
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| What is a native plant? | a plant that grows or lives in a particular region without direct or indirect human intervention
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| What is contour plowing? | used on hills; plow across the hill, NOT UP AND DOWN; slows down water flow so less soil is washed away
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| What are tree lines? | lots of trees planted to form a windbreak; slows down wind so it can't lift up soil and move it
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| What is crop rotation? | changing type of crop planted in same location each year; reduces loss of same type of nutrients in the soil
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| What are native PLANTS? | grasses and trees native to the area
soil are best adapted to the environment; grow well and roots reduce erosion
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| What is control? | standard to which experimental results can be compared
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| What are the 3 main components of soil? | silt, clay, and soil
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| What is the order, in greatest to least: the components of soil? | sand, silt, clay
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| What are the individual pieces of sand called? | grains
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| Can you see clay particles? | No, you need a microscope to see them.
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| Different soils from different places have _________________ amounts of each of the above | different
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| What are all of the layers of soils? | subsoil, bedrock, topsoil, parent material
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| What are the layers of soil in order? | topsoil, subsoil, parent material, bedrock
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| Why do we need organic matter? | We need it because bacteria and other microrganisms help break down and it eventually turns the chemicals into nutrients and nutrient help the soil.
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| What was the Dust Bowl? | The Dust Bowl was 1930's natural disaster affecting many central states, removing soil, and depleted nutrients and water.
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42josie
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