universe & solar system section 8 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 13
Question : 6 [SSC CGL Pre 2002]
Which of the following is called the twin of the earth ?
a) Mars
b) Saturn
c) Venus
d) Neptune
Answer »Answer: (c)
Venus is the second planet from the sun and a close neighbor to the earth. It was named after the Roman Goddess of Beauty. Venus is usually one the brightest objects in the sky, which might be the reason it got its name. It is quite similar to the planet earth mainly in its size and a few other characteristics which is why it is often considered the Earth’s twin.
However, surface conditions are not nearly the same making it a quite inhospitable environment.
Question : 7
The inexhaustible source of energy of the stars is due to
a) conversion of Helium to Hydrogen.
b) excess of oxygen that helps burning and release of energy.
c) conversion of Hydrogen to Helium.
d) decay of radioactive elements.
Answer »Answer: (c)
The inexhaustible source of energy of the stars is due to the conversion of Hydrogen to Helium. In the interior of a star, the particles move rapidly in every direction because of the high temperatures present. Every so often a proton moves close enough to a nucleus to be captured, and a nuclear reaction takes place.
Only protons of extremely high energy (many times the average energy in a star such as the Sun) are capable of producing nuclear events of this kind. A minimum temperature required for fusion is roughly 10 million K. Since the energies of protons are proportional to temperature, the rate of energy production rises steeply as temperature increases.
Question : 9
Consider the following statements:
- The Earth is nearest to the Sun on about January 3.
- Earth is farthest from the Sun on about July
a) Both 1 and 2
b) Neither 1 nor 2
c) 2 only
d) 1 only
Answer »Answer: (a)
The earth is nearest to the sun on about January 3rd. Earth is farthest from the sun on about 4th July.
Question : 10
The coriollis effect is produced by
a) earth’s rotation
b) earth’s rotation and revolution
c) earth’s revolution
d) pressure gradient
Answer »Answer: (a)
The Coriollis effect is the apparent deflection of global winds, ocean currents that moves freely across the Earth’s surface. The deflection is due to the rotation of the Earth on its axis.
IMPORTANT indian geography mcq EXERCISES
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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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