universe & solar system section 8 MCQ Questions & Answers Detailed Explanation
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The following question based on Universe, solar system and Astronomy topic of indian geography mcq
(a) January 3
(b) July 4
(c) Dec 22
(d) June 21
The correct answers to the above question in:
Answer: (a)
The Earth is closest to the Sun or at the perihelion on January 3, when it is winter in the Northern Hemisphere.
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Read more universe solar system astronomy Based Indian Geography Questions and Answers
Question : 1
The planet emitting green light is
a) Uranus
b) Neptune
c) Venus
d) Jupiter
Answer »Answer: (a)
The atmosphere of Uranus is composed of 83% hydrogen, 15% helium, 2% methane and small amounts of acetylene and other hydrocarbons. Methane in the upper atmosphere absorbs red light, giving Uranus its blue-green colour.
Question : 2
The inexhaustible source of energy of the stars is due to
a) decay of radioactive elements
b) excess of oxygen that helps burning and release of energy
c) conversion of helium to hydrogen
d) conversion of hydrogen to helium
Answer »Answer: (d)
A star shines due to thermonuclear fusion of hydrogen into helium in its core, releasing energy that traverses the star’s interior and then radiates into outer space.
Question : 3
Study the following statements and select the correct answer from the codes given below:
- The average density of rocks in the lower crust of the earth is 3.
- There is a gradual decrease in the velocity of the seismic waves through the lower crust.
- The mantle-core boundary is marked by Moho-discontinuity.
- The outer core of the earth is in molten form.
a) 3 and 4 are correct
b) 1 and 4 are correct
c) 2 and 3 are correct
d) 1 and 2 are correct
Answer »Answer: (b)
The crust is the outermost solid shell of a rocky planet or natural satellite, which is chemically distinct from the underlying mantle.
The Earth’s crust is composed of distinctly different continental crust and oceanic crust, which have different chemical compositions and physical properties, and which were formed by different geological processes.
Question : 4
‘Super nova’ is
a) an exploding Star
b) a black hole
c) an asteroid
d) a comet
Answer »Answer: (a)
A supernova is a stellar explosion that is more energetic than a nova. During this short interval, a supernova can radiate as much energy as the Sun is expected to emit over its entire life span.
The explosion expels much or all of a star's material at a velocity of up to 30,000 km/s (10% of the speed of light).
Question : 5
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.
Question : 6
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.
GET Universe, solar system and Astronomy PRACTICE TEST EXERCISES
universe & solar system section 1
universe & solar system section 2
universe & solar system section 3
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universe & solar system section 5
universe & solar system section 6
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universe & solar system section 8
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universe & solar system section 11
universe & solar system section 12
universe & solar system section 13
Universe, solar system and Astronomy Shortcuts and Techniques with Examples
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