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DearFriends,
In this blog you will find around 320 solved Geophysics GATE and CSIR-NET and other competitive exams solutions with a better explanation. Please follow and share if you like it.
Thanks,gpsurya and group
The reason why a lunar eclipse does not occur at every full moon is
the position of the sun is not favourable at all full moons.
the shape of the earth is not a perfect sphere.
the orbital planes of the moon and that of the earth are inclined to each other by a small angle.
the moon reflects only from one hemisphere.
If σ1 > σ2 > σ3 represnt the principal stresses, then a hydrostatic state of stress is characterised by following condition:
σ1 = σ2 = σ3
σ1 = σ2 > σ3
σ1 > σ2 = σ3
σ1 > σ2 > σ3
The meteorite group which most closely matches the composition of our solar system is
Iron meteorite
Ordinary chondrite
Lunar meteorite
Carbonaceous chondrite
An igneous rock comprising predominantly of quartz and K-feldspar can be classified as:
Granite
Peridotite
Gabbro
Tonalite
Which one of the following elements residence times is less than of the residence time of the sea water (103 to 104 years)
Calcium
Aluminium
Magnesium
Zinc
The process of nitrification can be described as
reduction of nitrate to molecular nitrogen
reduction of nitrate to ammonium
oxidation of ammonium to nitrogen
oxidation of ammonium to nitrate
What is the lithostatic pressure at the base of a 35 km column of granitic crust with an average density of 2.8 gm/cc ?
9.8 kilobars
5.6 kilobars
8.2 kilobars
7.2 kilobars
As compared to near surface geological targets, the geophysical response of deeper geological targets will have
larger amplitude and longer wavelength
longer amplitude and smaller wavelength
smaller amplitude and longer wavelength
smaller amplitude and smaller wavelength
Which of the following represents the correct relative abundance of elements in the Earth's curst?
O > Al > Fe > Mg > Ca > Si
Si > O > Fe > Al > Ca > Mg
O > Si > Fe > Mg > Ca > Al
O > Si > Al > Fe > Mg > Ca
A seismograph receivers a S-wave 60s after it receives the P-wave. If the velocities of P- and S-waves are 7km/s and 6km/s respectively, then the distance of the seismic focus from the seismograph is
42 km
7070 km
2520 km
72km
The decay of 222Rn86 to 218Po84 is by
electron capture
alpha decay
negatron decay
positron decay
The freezing point of seawater
increases with evaporation
is independent of salinity
decreases with salinity
increases with salinity
The tilt of the Earth's axis of rotation with respect to the plane of its orbit varies between 21.8 degrees and 24.4 degrees over a period of about
23,000 years
41,000 years
19,000 years
100,000 years
If ρ_s ,ρ_g and ρ_r are the resitivities of sea water, ground water and rain water, then which of the following statements is true?
ρ_s > ρ_g > ρ_r
ρ_s < ρ_g < ρ_r
ρ_s < ρ_g > ρ_r
ρ_s > ρ_g < ρ_r
Andean mountains- Atlantic Ocean - San Andreas fault represents one of the following sequences of plate boundaries:
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