universe & solar system section 11 Practice Questions Answers Test with Solutions & More Shortcuts
Universe, solar system and Astronomy PRACTICE TEST [13 - EXERCISES]
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universe & solar system section 11
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universe & solar system section 13
Question : 31 [SSC CHSL 2015]
Which of the following Scientist proved that the path of each planet around the Sun is elliptical?
a) Newton
b) Copernicus
c) Galileo
d) Kepler
Answer »Answer: (d)
According to Kepler’s First law (Law of Orbits), each planet revolves around the sun in an elliptic orbit, the sun occupying one of the Foci. The elliptical shape of the orbit is a result of the inverse square force of gravity. Kepler’s laws were derived for orbits around the sun, but they apply to satellite orbits as well.
Question : 33
The planet whose period of rotation is longer than the period of revolution around the sun is
a) Venus
b) Neptune
c) Mars
d) Mercury
Answer »Answer: (a)
Venus is the planet whose period of rotation is longer than the period of revolution around the sun. The period of rotation for Venus is 243 days. In other words, Venus takes 243 days to turn once on its axis so that the stars are in the same position in the sky.
Question : 34
Study the following statements about the interior of the earth and select the correct answer from the codes given below:
- The average density of the outer crust is 2.8.
- The crust is separated from the mantle by the Gutenberg discontinuity.
- There is sudden increase in the velocity of P waves along the mantle core boundary.
- The inner core of the earth is in molten state.
a) 1 and 3
b) 3 and 4
c) 2 and 3
d) 1 and 2
Answer »Answer: (a)
The Earth is formed of three concentric layers: the core, the mantle, and the crust; these are separated by transition zones called discontinuities.
The Earth’s inner core is the Earth’s innermost part and according to seismological studies, it has been believed to be primarily a solid ball with a radius of about 1,220 kilometres (760 miles), which is about 70% of the Moon’s radius. Moho discontinuity is the boundary between the Earth’s crust and Mantle.
Question : 35
Diamond ring is a phenomenon observed:
a) only along the peripheral regions of the totality trail
b) only in the central regions of the totality trail
c) at the end of a total solar eclipse
d) at the start of a total solar eclipse
Answer »Answer: (a)
Diamond ring is observed during solar eclipse, only along the peripheral regions of the totality trail.
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Universe, solar system and Astronomy Shortcuts »
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indian geography mcq CATEGORIES
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» Nature & Scope of Geography
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» Universe, solar system and Astronomy
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» Geomorphology & Earth landforms
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» Atmosphere & Climatology
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» Hydrosphere & Oceanography
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» Pedology or Soil & Agriculture
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» Ecology & Bio geography
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» World Physical Geography
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» World Human Geography (Population)
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» World Economic Geography (Industry, Trade, Transportation & Agriculture)
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» World Country, Capital, Area, Currency, Parliament, Religion, New & old name of country
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» Physiography & Geomorphology of India
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» Indian Drainage, Irrigation and Rivers & River Projects
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» Indian Climate
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» Ecology, Environment, Forest, Naturals vegetations of India & National Park of India
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» Indian Agriculture & Animal Husbandry
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» Minerals & Energy Resources of India
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» Industries & Trade in India
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» Transportation & Ports System of India
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