1) If the climate in an area has very little rainfall, what would the characteri
ID: 109190 • Letter: 1
Question
1) If the climate in an area has very little rainfall, what would the characteristics of the soil in the area be?
a.
thick, with a lot of organic material
c.
thick, with very little organic material
b.
thin, with a lot of organic material
d.
thin, with very little organic material
2) Why do geologists use thin sections of rocks?
a.
to determine if the rock is metallic
b.
to identify foreign substances
c.
to identify the minerals
d.
to determine the arrangement of atoms
3) Which of the following is a type of physical weathering?
a.
thermal expansion
c.
oxidation
b.
dissolution
d.
hydration
a.
thick, with a lot of organic material
c.
thick, with very little organic material
b.
thin, with a lot of organic material
d.
thin, with very little organic material
Explanation / Answer
1) If the climate of a region having a shortage of rainfall means that the area is suffered from the shortage of it and produces a dry climate there. this produces the sandy soil too in that location. if the rain is low than the soil erosion will be low as erosion will only be possible by one factor of such location. the factor of soil erosion in such location is happens due to flow of wind. means that the layers will be thick almost. but due to sandy and less water presence the development and origination of organic substance will be very less or not take place.
=> so the correct option is c). thick, with very little organic material.
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2) It will be easy and beneficial for a geologist if he take a very thine slice of the rock as its section. because if we take the rock sample for the study of it than it will be easy to classify it characteristics and hence the experiment to be performed on it will also be very efficiently determined by the geologist. the thin section have the ability to transmit the light through this and hence we can get perfect anaysis of the minerals present in the rock.
=> so the correct option is c).To identify the minerals.
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3) Physical Weathering can be defined as the geological process which enable the rock to break down in the simple compound like soil without changing their chemical composition. the modification will be just takes place physically and no chemical changes occurs in them. so dissolution oxidation and hydration are all chemical reaction which involved when the chemical weathering process is taking place. on the other hand thermal expantion is a physical process which involved in the process of physical weathering.
=> so correct option is a). thermal expansion
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