17. The colour of a fimely pow dered mineral i called a) Luster b) Streak b) Div
ID: 295839 • Letter: 1
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17. The colour of a fimely pow dered mineral i called a) Luster b) Streak b) Divergent plate boundary 19- Wihen sedimentary rocks are precipitation of norganic components, it is called component,It 20 oal a) Sedimentary clastic rocks b) Sedimentary organic rocks a) Clastic rocks b) Organic rocks c) Chemical rocks 21- If magma can come to form igneous rocks on the surface of the earth, it is called: 22- The continental crust is a) Clastic 3-25 km thick c) 3-15 km thick b) Volcanic c) Plutonic 23- Sediments 24- The red sea opening is an example of the become sedimentary rocks mainly by a) cementing the grains together b) squeezing and heating the grains together c) melting and cooling the grains a) Convergent plate tectonics b) Divergent plate tectonics c) Transform plate tectonics 25- Which of the following represent almost 26- Mohs minerals scale is used to fine 75% of the earth's crust elements? the rock a) Oxygen and Silicon b) Oxygen and Iron c) Oxygen and Aluminum a)Cleavage b)Hardness e)Density 27- Inner core of the Earth is: is ver 28- The along the line where the two plates a) Solid b) Liquid a) Volcanic arc b) Trench c) Spreading ridges Solid and Liquid 29- Gold is a type of mineral related to: 30- Igneous rocks are partly cla a) Carbonate mineral group b) Native element mineral group c) Silicate mineral group a) Fossil Content b) Foliation of the rocks c) Chemical Composition 31- One of the following is NOT mechanical 32-Vesicular texture indicate weathering: a) Rapid cooling b) Slow than fast cooling c) Gas trapped in cooling lava a) Thermal Cracking b) Dissolution c) Root Wedging 34-The word 'Paleozoic E 33-The age of universe is estimated at a) Middle life a) 14 billion years b) 14 million years b) New life c) Old lifeExplanation / Answer
17.
The color of a finely powdered mineral is called its streak. The streak can be completely different from its hand specimen. A simplest way to determine the streak is to rub the specimen across a piece of unglazed porcelain.
Answer: b
18.
Spreading ridges occur at divergent plate boundaries. Reason behind it is, as the plates move away, the magma below it overtops and form ridges.
Answer: b
19.
Sedimentary rocks formed by precipitation of inorganic components are called as clastic sedimentary rocks. These form by accumulation of weathered fragments of other rocks that have hardened with a cementing material. The cementing material will bound all the fragments and makes it harder.
Answer: a
20.
Coal is a organic sedimentary rock. This forms from plant debris. Organic sedimentary rocks form by the accumulation and lithification of organic debris such as plant debris or animal material.
Answer: b
21.
If the inorganic sediments by erosion process accumulates and cements by a bounding material that is called as clastic sedimentary rock.
If magma explodes on to the surface of the earth and solidifies, the resulting rock is called as volcanic rock.
If magma or rock melt solidifies at great depths, then it is called as plutonic rock.
Answer: b
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