Dark colored igneous rocks are enriched in silicon (Si), aluminum (Al), potassium (K) and sodium
(Na). and deficient in iron (Fe), calcium (Ca) and magnesium (Mg). - answer✔False
Sediment transported and deposited by glacial meltwater (glaciofluvial) is - answer✔outwash
In travelling from west to east, Ohio bedrock exposures generally become younger in age. -
answer✔True
All outcropping native bedrock in Ohio was formed during - answer✔the Paleozoic era
Most natural organic (peat) deposits in Ohio are found within the area once covered by glacial
ice. - answer✔True
Slate is created by metamorphic alteration of - answer✔shale
Glacial landform composed of a thin veneer of glacial till deposited by melting ice during glacial
retreat. - answer✔ground moraine
In the western half of Ohio, most soils are developed from some type of glacial deposit. -
answer✔True
Glacial outwash tends to be unstratified and poorly sorted. - answer✔False
Individual grains of intrusive (slowly cooled magma) igneous rocks cannot be seen without
magnification. - answer✔False
Identify the location of the cross-hatched area shown below. - answer✔T.1S R.1W Sec 10
In the topographic image below, the horizontal distance from the hilltop to the valley floor is
2192 ft. Find the percent slope and the elevation. - answer✔14, 20
In the topographic image below, the horizontal distance from the hilltop to the and elevation
contour interval. - answer✔5.4, 10
The density of a settling suspension of soil particles gradually increases with time. -
answer✔False
Remains a ball when squeezed, 1-2 inch long ribbons and excessively smooth feel is - answer✔a
silty clay loam texture
The buoyant force on a floating hydrometer is equal to the weight of the suspension displaced
by the hydrometer. - answer✔True
Particles of high density have higher settling velocities (fall faster in a suspension) compared to
particles of low density. - answer✔True
Remains a ball when squeezed, <1-inch long ribbons and neither excessively smooth nor
excessively gritty feel is - answer✔a loam texture
A 10-gram sample of mineral soil composed of 40% sand and 20% silt contains 4 grams of clay. -
answer✔True
Remains a ball when squeezed but does not ribbon is - answer✔a loamy sand texture
In a suspension of settling particles, the particle settling velocity decreases with - answer✔none
of the choices given??
Ca2+ is a better dispersant of clay particles than Na+. - answer✔False
Dry sandy soils evolve more heat of wetting compared to dry clayey soils - answer✔False
Attraction among water molecules for each other - answer✔cohesion
Atterberg limits are water contents at which soils undergo major changes of state (i.e. solid,
semi-solid, plastic, liquid). - answer✔True
A soil with LEP >9 is likely to be unsafe for building foundations. - answer✔True
Atterberg limits generally decrease with decreasing clay content. - answer✔True
Clayey soils can receive less water before reaching their liquid limit compared to sandy soils -
answer✔False
Atterberg limits are water contents at which soils undergo changes in behavior - answer✔True
A model for the structure of silicate clay minerals that best fits the results of clay surface area
measurements is - answer✔the layer model
Soils with low clay content generally have low plasticity index. - answer✔True
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