Test Preparation on IAS Prelims Sample Paper -9

Consider the foilowing water bodies:1. Gulf of Mexico2. . Caribbean Seaj3. Bering Sea4, Labrador SeaWhich of the following is coirect sequence of theabove water bodies when arranged nearest-tofarthestfrom the "International Date Line" (IDL)?

14-2-1-3
23-2-1-4
33-1-2-4
44-1-2-3

Correct sequence from IDL is as follows - Bering Sea - Gulf of Mexico - Caribbean Sea - Labrador Sea. The distance of the above water bodies from IDL can be indicated from their respective longitudinallocations. International Date Line Bering Sea Gulf of Mexico Caribbean Sea Labrador Sea Longitude location - 180

Consider the following statements;1- Rocks buried at a higher depth melt at ahigher temperature than similar rocks atthe surface.2. The "extra heat" required for melting isproduced by volcanic activity.Which of the statements given above is/arecorrect

11 only
22 only
3both 1 and 2
4neither 1 nor 2

Statement 1 is correct as rocks buried under the pressure of several km thickness of overlying rocks melt at higher temperature than similar rocks at the surface. A basaltic lava rock which melts at 125D

If the earth's direction of rotation is reversedwhat would be the time at Dibrugarh in Assamwhen It is midnight in London?

106.30 hrs
205.30 hrs
318.30 hrs
417.30 hrs

OSt^^da bred 1T8i:m3e0 hprSsT )a tw Dhiibcrhu igsa r5h: 3i0n Ahsrss aamh eaasd p terh atnh eL goinvdeonn c,o wndhiitciho nf,o Dlilobwrsu gGarrehe mfvolilcohw sM tehaen I nTdiimaen (GMT) taken as reference by all countries. . Normally, the earth rotates from west to east. But if this direction is reversed & the earth starts rotating from east to west, London ?yfill go ^ead of Dibrugarh by 5:30 hrs.

Which one of the foUoving statements does notapply to the Cenozoic Era on the Geological TimeScale?,

1Humans developed in this period.
2This period is also called the 'Age ofmammals'.
3It was dominated by the flowering plants &emergence of birds.
4Dinosaurs and many other species wereextinct in this period.

statement (c) dees not apply to the Cenosoic Era. Mesosoic Era was dominated by the first fiowering plants, emergence of birds and dinosaurs. Statements (a), (b) & (d) apply to the Cenozoic Era. The term Cenczoic means 'new life'. It is divided mto three periods: the Paleogene. Neogene and Quaternao'; and seven epochs: the Paieoccne, Eocene, Oligocene, Miocene, Pliocene, Pleistocene and Holocene

Why don't we see solar eclipse during everymoon's revolution around the Earth?

1Moon orbits in the same plane of the Earth's'orbital plane.
2The new moon and full "moon are alignedwith the lunar nodes.
3Moon orbits in a diflerent plane than theEarth's orbital plane.
4The moon's orbit is perfectly aligned withthe Earth's ecliptic.

Statement (c) is correct. The plane in which the Earth moves around the Sun is known as the

Which of the following are the possible effects ofGeomagnetic storms?1. Appearance of auroras2. Disruptions in communications systemsdue to high radiation.3. Impacts on satellite operations4. Heavy rainfallSelect the correct answer using the codes givenbelow

11 and 2 only
21,2, and 3 only
31 and 4 only
42,3 and 4 only

Points 1, 2 and 3 are correct. Rainfall has no relation with geomagnetic storms. Geomagnetic Storms: Geomagnetic storms are caused when events such as solar flares can send higher than normal levels of radiation towards Earth. This radiation interacts with the Earth's magnetic field causing a geomagnetic storm. Effects of Geomagnetic storms: Effects from the geomagnetic storm can range from the appearance of auroras or the northern and southern lights to disruptions in communications systems due to high radiation. It would make it difficult to communicate with others on Earth. Hence it impacts satellite operations.

I With reference to different weathering processesand their effects, consider the foliowing pairs;Weatheringprocess1. . Carbonation*2.3.OxidationHydration4. ReductionEffectBreaking down offeldsparsRed iron tumingyellowCalcium sulphateturning to gypsumRed iron turning brownWhich of the pairs given above are correctlymatched?

11,2 and 3 only
23 and 4 only
31 and 3 only
42 and 4 only

Pairs 1, 2 and 3 are correctly matched while pair 4 is wrong. Weatheringprocess Effect 1. Carbonation : Breaking down of feldspars 2. lOxidation 1 : Red iron turning yellow 3. llyd ration ; Calcium .sulphate turning to gypsum 4. Reduction : Red iron turning bluish grey

Consider the foliowing;1. Sulphur compoundsChlorineArgonNitrogen compounds .Pyroclastic debrisHydrogenWhich of the above materials find their way tothe surface of the earth during volcaniceruptions?

11, 2, 3 and 4 only
21,3,5 and 6 only
32, 4, 5 and 6 only
41, 2, 3, 4, Sand 6

All t'he points are correct. The materials that find their way to the surface of the earth during volcanic eruptions include lava flows, pyroclastic debris, volcanic bombs, ash & dust and gases such as nitrogen compounds, sulphur compoundsand minor amounts of chlorine, hydrogen and argon.

Which of the following is/arc evidence(s) in.support o|f plate" tectonics?1. PaJeomagnetic rocks are important evidencein support of plate tectonics.Evidences for both sea floor spreading andplate tectonics are complimentary.Older rocks form the ocean fioor whileyoungar rocks are present on thecontinents.2.3.Select thebelow

11 and 2 only
23 only
32 and 3 only
41,2 and 3

Evidence 1 is correct. Paleomagnetic rocks are the most important evidence in support of plate tectonics. The orientation of iron grains on older rocks shows an orientation which points to the existence of the South Pole, once upon a time, somewhere between the present-day Africa and Antarctica (Paleomagnetism). Evidence 2 is correct. Sea floor spreading is almost similar to plate tectonics except that it examines the interaction between oceanic plates only. Evidence 3 is Incorrect. The opposite is correct. Older rocks form the continents while younger rocks are present on the ocean floor.

10.

Which of the following are the necessaryconditions for the formation ofTropical Cyclones?1. Large sea surface with a temperaturehigher than 27' C.Presence of Coriolis force.Low-level anti-cyclonic circulation.Strong high-pressure area.Select the correct answer using the codes givenbelow:

11 and 2 only
22 and 3 only
33 and 4 only
41 and 4 only

The conditions favourable for the formation and intensification of tropical cyclones are:


Right Ans	Wrong Ans	Not Attempted