Enviro. Techniques Test #1 - Part C
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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| show | Clay
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| show | less than 0.002 mm in diameter.
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| show | colloidal particles
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| show | True
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| T/F: The least active portions of the soil are those in colloidal state. | show 🗑
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| show | Colloidal clays
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| show | Unique clay properties
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| T/F: Nearly all clay in natural soils is colloidal, and almost all colloidal clay is crystalline. | show 🗑
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| show | True
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| show | Silicates and non-silicates.
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| Which group of clay is composed of silica, aluminum and oxygen? | show 🗑
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| show | Non-silicate clays
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| Formed in temperate regions and dominate agricultural areas of the world? | show 🗑
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| Dominant in highly weathered soils in tropical regions? | show 🗑
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| Vermiculite, kaolinite (non-swelling for dishes) and montmorillonite (bentonite) are... | show 🗑
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| Has well formed crystals... | show 🗑
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| Has varied forms of crystals... | show 🗑
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| The crystals of these clay minerals are plate-like in nature, being built up of flat crystal units. | show 🗑
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| show | Silicate clays
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| Consists of one layer of silicate and the other layer of aluminum, all in definite spatial arrangement (i.e. kaolinite). | show 🗑
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| Crystals have two outside layers made of silica in the middle layer of aluminum (i.e. illite and montmorillonite). | show 🗑
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| show | Kaolinite clay
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| show | Illite clay
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| show | Montmorillonite clay
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| More surfaces are exposed as clays expand and more absorptive capacity of water between Crystal sheets. | show 🗑
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| Is the dominant clay mineral in bentonite (altered volcanic ash) which is used for sealing wells. | show 🗑
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| T/F: A single clay crystal is called “micelle” | show 🗑
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| show | True
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| T/F: Not all clays absorb water on their surfaces or lose water from their surface as the soil water content changes. | show 🗑
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| T/F: Some clays allow water into the interlayer spaces between layers of the crystal. | show 🗑
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| Feldspar (orthoclase and plagioclase), Amphiboles (hornblende), Pyroxene and Micas (biotite and Muscovite) weather to form? | show 🗑
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| show | Pores
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| show | Porosity
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| show | False - they do.
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| T/F:Pores can either be connected or not connected. | show 🗑
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| show | Well sorted deposits
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| show | Pore spaces
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| show | Poorly sorted deposits
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| show | Gravels and Sands
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| What soil class has smaller pore spaces than gravel and sand? | show 🗑
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| show | Clay
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| Represents the ideal volume of pore water for plants. | show 🗑
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| T/F: Above field capacity, water is not influenced by gravity and drains below the root zone quickly. | show 🗑
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| Represents the moisture content below which plants are no longer able to uptake water from the soil. | show 🗑
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| show | Hygroscopic Water
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| The remaining water adheres to soil particles and is unavailable to plants. | show 🗑
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| show | True
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| T/F: Porosity is also a potential pathway for contaminants. | show 🗑
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| Is the ability of a porous material to allow fluid to flow through it and is commonly symbolized with a letter K. | show 🗑
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| It is also known as hydraulic conductivity | show 🗑
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| T/F: Any material with voids is porous, and if the pores are interconnected it possesses permeability. | show 🗑
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| show | False - it is a concern.
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| show | Permeability
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| show | Void Ratio
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| show | Darcy’s Law
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| show | Soil Texture
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| What contains areas that represent the allowable combination of the three sizes and separates for each textural class name. | show 🗑
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| show | True
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| Two methods for describing a soil sample’s particle size distribution are: | show 🗑
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| Which test to determine soil particle size uses sieves to separate the particles. | show 🗑
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| Soils may be grouped into three major divisions: | show 🗑
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| show | Coarse-grained Soils
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| These coarse-grained soil particle sizes include: | show 🗑
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| show | Fine-grained soils
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| Fine-grained soils may be classed as: | show 🗑
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| show | True
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| T/F: Plasticity and particle size can be judged accurately without the use of refined testing techniques. | show 🗑
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| This group is placed in a separate group because of their appreciable content of organic matter. | show 🗑
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| show | Partly organic soils
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| show | Colour, odor, moisture, density, and structure.
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| show | Colour
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| A distinct lack of color in soil contributing to an overall grade or brownish color. | show 🗑
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| show | Saturated
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| show | Mottling
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| Such saturated soil conditions can lead to anaerobic conditions, and the movement of iron produces______ __ ____ ___ _____ soil colors interspersed with the dominant color. | show 🗑
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| This descriptor will normally indicate the presence of organic matter or contaminants. | show 🗑
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| show | Angular, sub angular, rounded and sub rounded.
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| __________ is the term applied to the particle size distribution of the soils. | show 🗑
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| show | Consistency
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| _______ is the ability to change shape and retain me impressed shape when the stress is removed. | show 🗑
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| The degree of plasticity of soils is the range in _______ ______through which the soil remains plastic horse capable of being molded. | show 🗑
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| _____ _____ of the soil is defined as the moisture content at which a thread of soil 1/8 inch in diameter will begin to crumble when rolled further. | show 🗑
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| show | Dilatency Test.
When a wet sample of soil is shaken vigorously in the hand, the surface will become glossy and show free water. When the soil sample is pressed, the moisture on the surface is reabsorbed (dilates) into the sample.
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| When a moist lump of soil is stroked with considerable pressure with the flat of a pen knife blade, or spatula, the type of surface created indicates the type of soil. What test is this? | show 🗑
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| show | Silt, clay.
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| show | Dry Strength Test
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| show | Sandy silt or silt.
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| Medium dry strength is shown by difficulty in powdering or crushing the soils by finger pressure, but the soil can be broken into pieces without great difficulty. This state indicates which type of soil(s)? | show 🗑
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| High dry strength is indicated when the Pat of dry soil cannot be broken with the fingers and this indicates the sample is made up mostly of? | show 🗑
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| After the Dilatency test, try to roll the soil sample into an eighth of an inch thread. Which test is this? | show 🗑
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| If you cannot roll a thread, then the sample is? | show 🗑
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| If you can roll a thread easily, then the sample is mostly? | show 🗑
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| show | A a mixture of clay and silt.
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| show | Stickiness test.
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| show | Clay, silt
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| show | Grit (toothpaste) Test
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| show | Silt, clay
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| Particle sizes - greater than 200 mm | show 🗑
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| Particle sizes - 75 mm to 200 mm | show 🗑
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| show | Gravel
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| show | Sand
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| Particle sizes - less than 0.05 mm | show 🗑
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| Particle sizes - 0.05 mm to .002mm | show 🗑
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| Naming Soil Samples - “and” denotes approximately? | show 🗑
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| Naming Soil Samples - “y” denotes approximately a? | show 🗑
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| Naming Soil Samples - “some” denotes approximately? | show 🗑
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| Naming Soil Samples - “trace” denotes approximately? | show 🗑
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| ____ ______ is the term applied to the nature of soil mass in place. | show 🗑
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| ____ ______ is the arrangement of soil particles into secondary units called aggregates or peds. | show 🗑
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| Soil structure is most usefully described in terms of: | show 🗑
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Created by:
ctherria
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