Title K-3213 (Earth Science) (Paper-II).pdf ✅

EARTH SCIENCES Paper – II Note : This paper contains fifty (50) objective type questions. Each question carries two (2) marks. All questions are compulsory. Paper II 2 K-3213 Total Number of Pages : 8 1. What do meteorites reveal about the solar system ? (A) The early solar system consisted mostly of hydrogen and helium gases (B) Meteorites are much older than comets and planets (C) The age of the solar system is approximately 4.6 Billion years (D) The solar system once contained 10 planets 2. Why are the inner planets made of denser material when compared to the outer planets ? (A) In the beginning, when the proto planetary disk was spinning faster, centrifugal forces flung the lighter materials towards the outer parts of the solar nebula (B) In the inner part of the nebula only metals and rocks were able to condense because of the high temperatures, whereas hydrogen compounds, although more abundant, were only able to condense in the cooler outer regions. (C) Denser materials sank to the center of the nebula (D) The sun's gravity pulled denser materials towards the inner part of the solar nebula while lighter gases escaped more easily 3. The central part of the earth's core is a solid because (A) The pressure at the centre raises the melting point (B) The magnetic field cannot penetrate the center of the core (C) Convection does not extent all the way to the centre of the core (D) The earth initially formed from solid particles in the solar nebula 4. The most favourable environment for preservation of fossil is (A) Terrestrial (B) Laccustrine (C) Fluvial (D) Marine 5. Compared to the continental crust the oceanic crust is _______________ (A) Thinner and more dense (B) Thinner and less dense (C) Thicker and more dense (D) Thicker and less dense 6. ____________of the earth's atmosphere shields the earth from ultraviolet radiation. (A) Equatorial bulge (B) Ozone layer (C) Ionic layer (D) Protective layer