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Soil Science-1

Q.1
The outermost 10 mile strata of the lithosphere are called_____________.

Soil
Horizon
Earth crust


Q.2
The gaseous envelope over the earth’s surface is the_____________.
Temperature
Atmosphere
Hydrosphere


Q.3
The two non-metallic elements occurring in greatest abundance in the earth crust are___________.
Calcium & Magnesium
Potassium & Sodium
Oxygen & Silicon


Q.4
Science which deals with the description of rocks __________.
Petrography
Petrogenesis
Chromatography


Q.5
Water plays an important role in the formation of___________.
Igneous rock
Sedimentary rock
Metamorphic rock


Q.6
Science which deals with the origin of rocks?
Petrography
Petrogenesis
Chromatography

Q.7
When igneous rocks are become metamorphic rocks due to pressure______________.

Hydro metamorphic
Thermo metamorphic
dynamo metamorphic


Q.8
The parent materials deposited near the base of strong slope by the action of gravity____________.
Lucustrain
Colluviums
Alluvium


Q.9
The parent materials of sand size transported by the action of wind is called____________.
Eolian
Moraine
Loess


Q.10
The excavation and destructive action of water on rock and minerals is called____________.
Exfoliation
Denudation
Chemical weathering


Q.11
The rocks gets broken in pieces due to temperature is called____________.
Chemical weathering
Denudation
Exfoliation


Q.12
The fourth most abundant element in the earth crust is_______.
Oxygen
Iron
Aluminum


Q.13
Marble is metamorphic rock converted from lime stone due to the action of _______.
Temperature
Pressure
Heat


Q.14
The individual grains size in rudaceous sedimentary rock are of_______.
Sand
Clay
boulders and pebbles


Q.15
The clay fraction of the soil has diameter less than________>
0.002 mm
0.2 mm
0.02 mm


Q.16
The time that nature devotes to the formation of soil is termed as__________.
Periodical table
Pedological time
Soil stages


Q.17
B1 horizon in the soil profile is also known as__________?
Allivial
Eluvial
Illuvial


Q.18
Sedimentary rocks are also known as__________.
Metamorphic rock
Igneous rock
Stratified rock


Q.19
Accumulation of Calcium carbonate in the profile is called __________.
Salinization
Solonization
Calcification


Q.20
An active soil forming factor is__________.
Climate
Parent material
Topography


Q.21
An artificially formed soil mass is called___________.
crust
clod
pad


Q.22
Deep black soil of Gujarat is also known as ____________.
black soil
alluvial soil
regurs soil


Q.23
The heavy black soils have ____________ soil structure.
columnar
crumby
platy


Q.24
Two water molecules are held by ________ bond.
Hydrogen
ionic
covalent


Q.25
The soil having PD 2.50 g/cc and BD 1.25 g/cc will have _____ % porosity.
45
50
55

Number of score out of 25 = Score in percentage =


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