Lithosphere - Study Mode
[#71] If the original day sediments are subjected to high temperature and pressure, they successively change into rocks, the correct order of which is ________
Correct Answer
(D) Shale, Slate, Schist
Explanation
Solution: If the original day sediments are subjected to high temperature and pressure, they successively change into rocks, the correct order of which is Shale, Slate, Schist. Beginning with a shale parent, Barrovian metamorphism produces a sequence of metamorphic rocks that goes through slate, and then through phyllite, schist, and gneiss.
[#72] Which of the following is/are matched correctly? 1. Earthquake's origin - seismic focus 2. Epicentre - point on earth's surface directly above seismic focus 3. S waves - similar to sound waves 4. Richter scale - severity of earthquake
Correct Answer
(B) 1, 2, 3 and 4
Explanation
Solution: All the four are matched correctly. Earthquake's origin - seismic focus. Epicentre - point on earth's surface directly above seismic focus. S waves - similar to sound waves. Richter scale - severity of earthquake.
[#73] In an artesian well, in what order the rock-layer are generally found? (from bottom to surface)
Correct Answer
(D) Non-permeable, permeable and non-permeable
Explanation
Solution: In an artesian well, the rock-layer are generally found in Non-permeable, permeable and non-permeable order. Permeable layers of rock that store and transport water are called aquifers. While porosity and permeability usually go hand-in-hand, though some porous rocks are not permeable and some impermeable rocks are porous. Permeability is affected mostly by the size and arrangement of the grains in the soil.
[#74] The type of igneous rocks which are formed midway between volcanic and plutonic rocks, are known as ________
Correct Answer
(B) Hypabyssal
Explanation
Solution: The type of igneous rocks which are formed midway between volcanic and plutonic rocks, are known as Hypabyssal. Hypabyssal rock, is an intrusive igneous rock that is emplaced at medium to shallow depths (>2 km) within the crust, and has intermediate grain size and often porphyritic texture between that of volcanic and plutonic rocks.
[#75] In which part of Africa, Sahara desert is located?
Correct Answer
(C) Northern
Explanation
Solution: The Sahara desert is located in the Northern part of Africa whereas Kalahari desert is situated in southern half. It is world's largest hot desert. Harmattan winds which blow over the Sahara Desert are also known as doctor's winds, as they kill disease cause vectors.