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CBSE Questions for Class 8 Physics Stars And The Solar System Quiz 6 - MCQExams.com
CBSE
Class 8 Physics
Stars And The Solar System
Quiz 6
Which of the following are examples of celestial objects?
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Asteroids
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Moons
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Planets
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All of above
Explanation
Celestial body or heavenly body is a naturally occurring physical body that can be found outside the Earth's atmosphere. Stars, planets, moon, comets, meteors, asteroids are all classified as celestial bodies.
Which of the following is the biggest celestial body?
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Galaxy
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Universe
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Asteroids
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meteors
Explanation
Stars, planets and Sun together makes the solar system. Group of solar systems form a galaxy. Groups of galaxy forms the universe.
Universe --> Galaxies --> Solar systems.
Orion is the name of a:
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star planet
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planet
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galaxy
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constellation
Explanation
Orion is a type of a constellation.
It is one of the brightest and easily recognisable constellation in the night sky.
The un-burnt piece of meteor which reaches the surface of the earth is called ........................
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a celestial body
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a meteorite
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a comet
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a star
Explanation
A part of the meteor that reaches the earth's surface without being burnt is called a meteorite.
Some planets and their characteristics are given below. Which option is wrong among this?
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Earth - possesses living organism
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Venus - bright planet
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Mars - reddish planet
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Jupiter - smallest planet
Explanation
Only earth has living organisms in solar system.
Venus is the brightest planet because its thick clouds reflect most of the sunlight that reaches it back into space hence it appears very bright.
Mars have iron present on it which when come in contact with outer environment becomes reddish.Hence mars appear reddish.
Jupiter is the largest planet in the solar system.
___________ was launched in the honour of Kalpana Chawla, a space scientist of Indian origin, who died in mishap in a space vehicle. Fill in the blank.
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INSAT-3E
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INSAT-3D
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INSAT-1A
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INSAT-IID
Explanation
INSAT-3E is the fourth satellite launched in the INSAT-3 series. It is an exclusive communication satellite to further augment the communication services that are being provided by the INSAT System.
$$\text{INSAT-3E}$$ was launched in the honour
of Kalpana Chawla, a space scientist of Indian origin, who died in
mishap
in a space vehicle.
Light moves at velocity of roughly __________ kms in every second.
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300,000
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500000
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100000
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400000
Explanation
The velocity of the light is precisely 299792458 metres per second or 3 x 10$$^8$$ m/s.
Hence, Light moves approx 300000 kms in every second.
Astronomers use light years to measure the speed of light.
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True
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False
Explanation
$$\text{Light Year}$$ - It is the distance travelled by light in free space in $$1\ year$$.
So, it is obvious that light-year is a bigger unit of distance. It is not a unit of speed.
The Andromeda Galaxy is____________ away from Milky Way.
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2.5 million light years
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3.5 million light years
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2 million light years
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5.6 million light years
Explanation
Andromeda galaxy is the nearest galaxy to our Milky Way. It is about 2.537 million light-years away from milky way.
The surface of the Moon:
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at one time had running water
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has changed little in the past 2-3 billion years
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has an atmosphere similar to the Jovian planets
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acquired its present appearance about 100 million years ago
Explanation
The surface of the moon is divided into lunar terrae and lunar maria. Lunar maria formed due to volcanic flow that occurred billions of years ago. There has been no volcanic activity in the past 2-3 billions years, the surface of the Moon has remained unchanged ever since then.
The total mass of the gases on Moon's atmosphere is about:
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25000 Kg
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50000 kg
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5000 kg
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20000 Kg
Explanation
There is a thin layer of the gases that forms the exopshere of the Moon. These gases are disperesed to such an extent that they rarely collide. The masses of these gases is about 25,000 kgs or 55,000 pounds.
Which of the following is the only satellite sent by ISRO to moon?
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PSVL
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GSLV
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Chandrayaan -1
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None of the above
Explanation
Chandrayaan-1 is the only satellite, out of the given, which was sent to moon for the exploration of moon.
PSLV (Polar Satellite Launch Vehicle) and GSLV (Geosynchronous Satellite Launch Vehicle) are the satellite launch vehicles .
When did the Indian National Committee for Space Research form?
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October 1960
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November 1962
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October 1962
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November 1960
Explanation
Indian National Committee for Space Research (INCOSPAR) was founded by indian government in October 1962 under Dr. Vikram Sarabhai .
Distance from Earth to Proxima Centauri, the next nearest star is:
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$$4.24$$ light years
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$$5.5$$ light years
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$$4.0$$ light years
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$$3.5$$ light years
Explanation
Proxima Centauri, a part of a triple star system named Alpha Centauri, is the closest star to our solar system. It is about $$4.24$$ light years away from the Earth.
The planet also known as morning star is:
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Mars
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Mercury
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Earth
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Venus
Explanation
Venus is visible a few hours before sunrise due to its peculiar alignment.
Hence, it is called a morning star.
First launch of an indigenous sounding rocket formed, Thumba, was in :
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November 1962
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November 1964
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November 1965
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November 1967
Explanation
The first indigenous sounding rocket was launched from Thumba (Thumba Equatorial rocket launching station) on November 1967 .
Solar system comprises of the sun, its planets, their satellites, asteroids and meteors. Which of the following is not a member of the solar system?
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Sun
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Asteroids
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Shooting stars
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Artificial satellites
Explanation
Solar system consists only of natural celestial bodies like sun, planets, natural satellites, asteroids, etc. So, artificial satellites are not are not the members of the solar system.
Which is the second biggest planet in the solar system?
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Jupiter
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Saturn
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Earth
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Neptune
Explanation
Order of planet according to its size are
Jupiter > Saturn > Uranus >Neptune > Earth > Venus > Mars > Mercury.
Hence second biggest planet in the solar system is Saturn
.
Out of the following, which planet will take the most time to make 1 revolution around the Sun?
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Mercury
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Earth
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Jupiter
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Saturn
Explanation
The time period of revolution depends on the radius of the orbit. Greater the radius, greater is the period. Since Saturn is the farthest planet from the sun, its radius is the greatest and so is the time period.
________
and
______
are the only planets without moons.
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Mercury, Venus
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Mars, Venus
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Jupiter, Saturn
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Earth, Mercury
Explanation
Planet Moons(Number)
Mercury 0
Venus 0
Earth 1
Mars 2
Jupiter 67
Saturn 62
Uranus 27
Neptune 14
Pluto 5
Only Venus and Mercury do not have any Moon.
Here the Moon represents a natural satellite that revolves around the planet for earth's natural satellite is Moon.
................................moon appears after the waxing crescent.
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Third Quater
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First Quarter
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Waxing Gibbous
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New moon
Explanation
$$\text{First Quarter}$$ moon appears after the Waxing Crescent.
How many phases does Moon has?
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7
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8
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9
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10
Explanation
Moon has eight phases namely new moon, waxing crescent moon, first-quarter moon (or a half-moon), waxing gibbous moon, full moon, waning gibbous moon, last quarter moon (or a half-moon), and waning crescent moon.
Which planet has the highest period of revolution?
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Neptune
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Uranus
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Mercury
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Venus
Explanation
The period of the revolution depends on the radius of the orbit of the planet. Greater the radius, the greater is the period. Since Neptune is the farthest planet from the sun, its radius of the orbit is the greatest, so is the period.
Choose the correct option regarding the movement of Earth, Moon, and Sun.
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Earth revolves around Moon, Moon revolves around Sun.
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Sun and the Moon both revolve around Earth.
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The moon revolves around Earth and Earth revolves around Sun.
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Sun and Earth both revolve around Moon.
Explanation
Sun is stationary and Earth while rotates on its axis also revolves around the Sun and the moon too spins on its axis but also revolves around the earth.
If the axis of rotation of the earth were extended into space then it would pass close to
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The moon
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The sun
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The pole star
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The centre of mass of all the planets in the solar system
Explanation
A pole star is a visible star, which lies approximately directly overhead when viewed from the earth's north pole. In practice, the term pole star usually refers to Polaris, which is the current northern pole star, also known as the north star. So if the axis of the earth is extended it will pass close to the pole star.
The movement of Earth around its axis is called
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Rotation
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Translation
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Revolution
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Oscillation
Explanation
Movement of earth on its own axis is called Rotation while movement around the Sun is called Revolution.
Earth __________around the sun ?
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rotates
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revolves
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roam
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none of these
Explanation
In solar system sun is at centre and other planets complete revolutions around it. so Earth also revolves around the Sun with a period of $$365\cfrac { 1 }{ 4 } $$ days.
Poles of Mars are covered by ___________.
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Iron
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Ice
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Nitrogen
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Dry ice
Explanation
Mars' both poles consist primarily of water ice. Frozen carbon dioxide accumulates as a comparatively thin layer about one metre thick on the north cap in the northern winter, while the south cap has a permanent dry ice cover about 8 m thick.
Light from the sun reaches the earth approximately in
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5 s
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50 s
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500 s
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0.5 s
Explanation
Time taken by light to reach the earth from the sun is,
$$t= 8\ min\ 20\ s= 8 \times 60s + 20 s $$
$$= 480\ s+ 20\ s = 500\ s$$
The following planet is considered as Earths-twin
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Mars
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Venus
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Mercury
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Saturn
Explanation
Venus is called Earth's twin because Venus and Earth are almost the same size, have about the same mass (they weigh about the same), and have a very similar composition (are made of the same material). They are also neighboring planets. However, Venus and Earth are also very different. Venus has an atmosphere that is about 100 times thicker than Earth's and has surface temperatures that are extremely hot. Venus does not have life or water oceans like Earth does. Venus also rotates backwards compared to Earth and the other planets.
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