26. The planet whose period of rotation is longer than the period of revolution around
the sun is
(a) Mercury
(b) Mars
(c) Venus
(d) Neptune
27. The last stage in the life cycle of a star is
(a) Black Hole
(b) Supernova
(c) Red Giant
(d) White Dwarf
28. Time taken by Sun’s light to reach Earth is
(a) 8 min 18 sec
(b) 9 min
(c) 9 min 18 sec
(d) 6 min 18 sec
29. Time taken by Moon’s light to reach Earth is
(a) 58 sec
(b) 1.34 sec
(c) 1.58 sec
(d) 2.32 sec
30. Space between Earth and Moon is known as
(a) Cislunar
(b) Fulalunar
(c) Nebula
(d) None of these
31. Our solar system is located in which Galaxy?
(a) Proxima Centauri
(b) Alpha Centauri
(c) Milky Way
(d) Andromeda
32. Which of the following stars is also known as Pulsar?
(a) Red Giant
(b) White Dwarf
(c) Neutron Star
(d) Massive Star
33. Which of the following stars is known as Fossil star?
(a) Protostar
(b) Dog Star
(c) Red Giant
(d) White Dwarf
34. The energy of sun is produced by
(a) Nuclear fission
(b) Ionisation
(c) Nuclear fusion
(d) Oxidation
35. Which of the following does not belong to solar system?
(a) Asteroids
(b) Comets
(c) Planets
(d) Nebulae
36. Which one of the following planets is nearest to the earth?
(a) Mercury
(b) Venus
(c) Mars
(d) Uranus
37. Cycle of sun spots is
(a) 9 years
(b) 10 years
(c) 11 years
(d) 12 years
38. The group of small pieces of rocks revolving round the sun between the orbits of
Mars and Jupiter are called
(a) Meteors
(b) Comets
(c) Meteorites
(d) Asteroids
39. Which one of the following conditions is most relevant for the presence of life on
mars?
(a) Atmospheric composition
(b) Thermal conditions
(c) Occurrence of ice cap and frozen water
(d) Occurrence of ozone
40. Among the following which planet takes maximum time for one revolution around
the sun?
(a) Earth
(b) Jupiter
(c) Mars
(d) Venus
41. Which planet is called “Evening star”?
(a) Mars
(b) Jupiter
(c) Venus
(d) Saturn
42. The Earth distance becomes minimum from the sun?
(a) 3rd January
(b) 4th July
(c) 22nd March
(d) 21st September
43. Which planet is surrounded by ring?
(a) Saturn
(b) Mars
(c) Venus
(d) Earth
44. Lunar eclipse occurs
(a) When moon lies between earth and sun
(b) When earth lies between sun and moon
(c) When sun lies between earth and moon
(d) None of these
45. By how much degree the earth is inclined on its own axis
(a) 231/2
(b) 661/2
(c) 241/2
(d) 691/2
46. The planet Pluto has been abandoned from the group of conventional planet and
kept in the group of dwarf planet by a summit held in
(a) Paris
(b) London
(c) Geneva
(d) Prague
47. Which of the following elements occurs the most abundantly in our universe?
(a) Hydrogen
(b) Oxygen
(c) Nitrogen
(d) Helium
48. Two planets which have no satellites
(a) Earth and Uranus
(b) Mercury and Venus
(c) Mercury and Mars
(d) Venus and Mars
49. The Astronaut looks the sky in the space
(a) Blue
(b) Black
(c) Red
(d) White
50. The black part of the moon is always calm and dark which is called
(a) Sea of tranquility
(b) Ocean of storms
(c) Area of storms
(d) none of these
Answer Key:
26. (c) 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.
27. (d) The last stage in the life circle of a star is white dwarf. Small stars, like the
Sun, will undergo a relatively peaceful and beautiful death that sees them pass
through a planetary nebula phase to become a white dwarf.
28. (a) On an average Sunlight reaches on Earth in 8 min. 20 sec.
29. (b) Moonlight reaches on Earth around 1.3 sec.
30. (a) Space between Earth and Moon is known as Cislunar. Pertaining to the space
between the earth and the orbit of the moon.
31. (c) Our solar system is located in Milky Way Galaxy. The Milky Way is the galaxy
that contains our Solar System. Its name “milky” is derived from its
appearance as a dim glowing band arching across the night sky in which the
naked eye cannot distinguish individual stars.
32. (c) Neutron star is also known as Pulsar. A neutron star is a type of stellar
remnant that can result from the gravitational collapse of a massive star.
33. (d) White Dwarf is known as Fossil star. They are supported by electron
degeneracy pressure. It amplifies the contrast with red giants. They are both
very hot and very small. They are the opposite of black holes. They are the
end-products of small, low-mass stars.
34. (c) Sun generates its energy by nuclear fusion of hydrogen nuclei into helium.
35. (d) Nebulae is an interstellar cloud of dust in outer space.
36. (b) Venus is nearest planet to Earth. Although distance is not fixed and it may
vary from 38 million to 261 million Km depending upon orbital motion.
37. (c) The number of sunspots observed on the surface of the sun varies from year
to year in a cyclical way. The length of the cycle is around 11 years on
average.
38. (d) The group of small pieces of rocks revolving round the sun between the orbits
of Mars and Jupiter are called asteroids.
39. (c) Presence of ice cap and frozen water on Mars is one of the most significant
reasons for presence of life forms.
40. (b) Jupiter takes maximum time for one revolution around the sun. Jupiter
revolves or orbits around the Sun once every 11.86 Earth years, or once every
4,330.6 Earth days. Jupiter travels at an average speed of 29,236 miles.
41. (c) Venus is called the Evening star. Because it trails the Sun in the sky and
brightens into view immediately after the Sun sets and when the sky is dark
enough. When Venus is at its brightest, it appears visible merely minutes after
the Sun has set.
42. (a) The Earth shows minimum distance from the Sun on 3rd January.
43. (a) Saturn is surrounded by ring. Saturn has a ring around it because it is
believed to be very big and has lots of moons, meaning it has a strong pull of
gravity. Another major reason is that the asteroids fling into its orbit and the
rings are not solid.
44. (b) In Lunar eclipse Earth comes between Sun and Moon.
45. (a) Earth is inclined by 23 1/2 degree on its axis.
46. (d) The planet Pluto has been declared as a dwarf planet in the summit held in
Prague. In August 2006 the International Astronomical Union (IAU)
downgraded the status of Pluto to that of “dwarf planet.” This means that from
now on only the rocky worlds of the inner Solar System and the gas giants of
the outer system will be designated as planets.
47. (a)
48. (b)
49. (b) The sky looks black from the space. In space, sunlight or any kind of star light
does not have anything from which to bounce off.
50. (a) The black part of the moon is called sea of tranquility. Sea of tranquility is not
an actual sea but rather the point at which Apollo 11 first landed on when it
reached the moon. It is a lunar mare which mainly consists of basalt rock and
is located on the Tranquillitatis basin which is on the Moon. The mare has a
tint which is slightly blue in colour and stands out from the rest of the moon.
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