universe & solar system section 10 Practice Questions Answers Test with Solutions & More Shortcuts

Universe, solar system and Astronomy PRACTICE TEST [13 - EXERCISES]

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Question : 6

The different phases of the moon are caused by

a) changing angle of sun

b) none of these

c) changing angle of sunlight hitting the moon

d) changing angle of earth with respect to moon

Discuss »

Answer: (d)

The different phases of the moon are caused by changing the angle of the earth with respect to moon. The moon’s phases are a result of the moon’s orbit around the earth as it reflects the sun’s light.

The lunar phases vary cyclically as the Moon orbits the Earth, according to the changing relative positions of the Earth, Moon, and Sun.

Question : 7 [UPPCS (Mains) 2004]

The ring of Jupiter is composed of

a) Very thick and opaque

b) All of the above

c) Non-existent

d) Silicates

Discuss »

Answer: (d)

Question : 8

Which of the following statements in regard to the galaxy is correct?

a) A galaxy is a huge system of billions of stars and clouds of dust and gases

b) A galaxy does not have a sun

c) Galaxy is found between the orbits of Mars and Jupiter

d) Numerous tiny bodies that move around the sun are called galaxies

Discuss »

Answer: (a)

A galaxy is a huge system of billions of stars and clouds of dust and gases.

Question : 9 [CSAT 2015 - I]

What explains the eastward flow of the equatorial countercurrent?

a) Difference in salinity of water

b) Occurrence of the belt of calm near the equator

c) Convergence of the two equatorial currents

d) The Earth’s rotation on its axis

Discuss »

Answer: (d)

The Earth’s rotation on its axis explains the eastward flow of the equatorial counter-current. The earth would have been rotating east to west, the piled-up water would have come down on the west side.

Therefore, essentially it’s the earth’s rotation that explains the eastward flow of equatorial counter current.

Question : 10 [IAS (Pre) 2008]

Which of the given two planets are between Mars and Uranus in order of distance from Sun?

a) Saturn and Earth

b) Saturn and Neptune

c) Jupiter and Saturn

d) Earth and Jupiter

Discuss »

Answer: (c)

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