1.Which of the following is NOT formed from deposits of minerals which are hardened,cemented,and packed together?
a)Silt
b) Shale
c) Limestone
d)Pumice
2.Which of the following materials has the lowest porosity?
a)Shale
b) Granite
c)Limestone
d)Gravel
3.Which of the following rocks is most evident in caves?
A) basalt
b) limestone
c) sandstone
d)Granite
4.The following belong to the group of silicates EXCEPT?
a)Amazonite
b)Barite
c)Topaz
d)Talc
5.Pumice is an extrusive rock usually has fine-grained structure.Which of the following correcty describes the use of this type of rock?
a) It is used in buildings,bridges,paving monuments,and other exterior projects
b) It is a source of chromium ore
c) It is used to manufacture stone tools,scrappers,and blades
d) It is used to make lightweight concrete or insulative low-cinder blocks
6. The following metamorphic processes can cause many changes in rocks EXCEPT?
a) Decrease density
b)Growth of larger crystal
c) Reorientation of minerals
d)Transformation from low temperature to high temperature minerals
7.Which of the following igneous rocks are formed when large masses of magma solidify slowly below the surface? It consist of a mass of inter grown crystals which are rough equal in size and large enough that the individual crystals can be identified with the unaided eye.
a) Aphanitic
b) Glassy
c) Phaneritic
d) Phorphorytic
8. Which of the following igneous rocks is ejected into the atmosphere where it is quenched quickly and cools rapidly?
a) Aphanitic
b) Glassy
c) Phaneritic
d) Phorphorytic
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Answer:
C
D
A
B
A
A
B
C
Explanation:
the following igneous rocks is ejected into the atmosphere