CSIR NET Earth Science Mock Test - 5 - CSIR NET Earth Science MCQ

Three circles of equal diameters are placed such that their centres make an equilateral triangle as in the figure

Within each circle, 50 points are randomly scattered. The frequency distribution of distances between all possible pairs of points will look as

The depth up to which the mantle is said to exist is ________

The branch of geology which deals with the morphology, classification, mechanism and causes of development of these rock structures is called as

What is a plunging fold?

If the Sun were to rotate faster than the present, there would be an increase in

A strong convective weather event

Which one of the following statements about high tides is INCORRECT?

Which of the following oceans/seas is decreasing in its total area for the past few million years?

Which ocean is triangular in shape?

Mg₂ Sio. is crystallizing from a magma containing 30% Mgo and 70% SiO₂ Which of the following diagrams correctly displays the direction (arrow) of change in the residual melt composition?

Two rock masses E and P of identical chemical compositions and physical properties simultaneously acquired thermorermanent magnetism (TRM) at the magnetic equator and pole, respectively. The TRM of P is then

Which of the following rocks makes most of the upper mantle of the Earth?

Which of the following isotope ratios get significantly fractimated during evaporation of sea water?

Which of the following explains best the oceanic conveyor belt?

Joints running parallel to hinge lines are called

A group of strata centrally centrally uplifted is

The fault where fault strike is parallel to the dip of the layers broken and disrupted by the fault

When the downthrow is _____________ direction of the dip, it leads to omission.

Identify the correct sequence of changes in the orbital parameters on the basis of the time span of the cycle. E = Eccentricity: 0 % O = obliquity: P-precession

If R_A, R_B, R_C and Re are the residence times of scavenged, recycled and major elements in the Ocean respectively, then:

In an ore forming process and Fe are deposited as oxide minerals respectively in one of the following environments

Typically the east-west components of horizontal winds have higher magnitudes than their North-South components primarily

Salinity of the oceans was the highest

Consider an imaginary earth model of thick fluid core surrounded by a thick mantle and thin or no crist. The density in the mantle increases from 3.0 gm/cc at the surface to 5.0 gm/cc at the core -mantle boundary, and it abruptly increases to 10.0 gm/cc in the care. The velocity of the P wave, increase from 3.0 km/sec to 8.0 km/sec in the mantle, and is abruptly falls to 4.0 km/sec in the core. Direct P waves omanating from an earthquake at angles of incidence less than sin^-3(3/16) cannot be received anywhere on the earth's surface. Further the time of arrival of the P wave increases at a rate of 250 sec/radian prior to the onset of shadow zone,

The radius of earth model is,

Air flow around a to madic low pressure in the Northern hemisphere has

It is known that the Eastern Equatorial Pacific warms during El-Nino Southern Oscillation phenomenon. The reason for the above is that ocean Ekman transport over Eastern Equatorial Pacific is:

The quantity of carbon in carbon reservoirs of the Earth other than the atmosphere is very high. Yet, the increase of atmospheric carbon bya few ppm/yr is of grave concern. This is because