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CBSE Questions for Class 8 Physics Stars And The Solar System Quiz 11 - MCQExams.com
CBSE
Class 8 Physics
Stars And The Solar System
Quiz 11
What does the Big Bang Theory say?
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All of the matter in the Universe exploded from a tiny, dense point
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Two galaxies collided causing a big bang
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The universe was created in its current location
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The universe is collapsing and getting smaller.
Explanation
We know that the universe consists of stars and their respective planetary systems.
As per the Big Bang Theory, at the beginning of the universe, there was a huge mass of matter. This mass exploded and got broken up into millions of fragments. These fragments became stars. Some parts of these stars got detached from them and cooled down to form planets.
This is how the Universe was created.
The moon takes _____ days to complete one spin.
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$$25$$
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$$26$$
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$$27$$
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$$28$$
Explanation
The moon orbits the Earth once every $$27.322$$ days. It also takes approximately $$27$$ days for the moon to rotate once on its axis. As a result, the moon does not seem to be spinning but appears to observers from Earth to be keeping almost perfectly still.
At what phase are the earth, moon and sun are in approximate alignment?
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Full Moon
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New Moon
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Waning Crescent
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Waxing Crescent
Explanation
The moon is visible on earth because the light from the sun falls on it, gets reflected from it and enters the eyes of the people who are watching it on earth. The moon appears crescent, half, full, not at all, etc, depending on its position with respect to the sun and the earth.
The light falling on any part of the moon gets reflected. However the light reflected only from some part of the moon reaches the earth. Only that part is visible to the people on the earth.
On the new moon day, the moon is on the same side of the earth as that of the sun with respect to earth. No light from the moon reaches the earth and it becomes invisible. Its apparent colour is black, i.e. same of that as that of the night sky.
On the full moon day, the moon is on the opposite side of the earth as that of the sun with respect to earth. The light reflected from the entire moon reaches the earth and it appears like a glowing circular disc.
Thus, on new moon day and a full moon day, earth, sun and moon are almost in one line.
Which is the first phase of the moon cycle?
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Waxing Cresent
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Waning Crescent
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New Moon
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Full Moon
Explanation
New Moon is a phase of the moon cycle in which it is not visible at all.
On the next day, a small part of the moon is visible. Thereafter, the moon appears to be expanding day by day.
On a special day, the moon appears completely full and visible. This is known as Full Moon. The period from New moon to Full moon is considered as the 1st half cycle.
After this the moon appears to be diminishing day by day and one day, it is completely invisible. That is, a New moon day arrives. One complete cycle is over, and a new cycle begins on the New Moon day.
Hence the New moon (which is invisible) is considered as the first phase of the moon cycle.
The poles of ...................... planet face the sun for longer periods of time than any other planet.
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Mars
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Uranus
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Jupiter
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Saturn
Explanation
The pole of $$Uranus$$ faces the Sun for a longer period of time than any other planet as its axis makes $$98°$$ and lies sideways therefore poles facing the Sun most of the time.
Heat waves are trapped to the maximum extent on which planet?
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Mercury
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Earth
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Venus
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Neptune
Explanation
Due to the presence of Carbon dioxide in large amounts on Venus, carbon dioxide, a greenhouse gas, traps a large amount of heat.
Planets are divided in to two groups based on their characteristic.
$$Group - 1$$
$$Group - 2$$
Structure of planets resemble to earth
Structure of planets resembles Jupiter
They have fewer natural satellites
They have large number of natural satellites
They have thin atmosphere
Rings are seen around planets
Which of the following in included in group $$-2$$?
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Mercury and Venus
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Saturn and Mercury
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Jupiter and Saturn
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Jupiter and Venus
What would be the phase called if Moon is seen in the sky as shown in the figure?
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Waxing Gibbous
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First Quarter
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Full Moon
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New Moon
Explanation
The phase of the moon as shown in the above figure is First Quarter . For first quarter only half moon is visible.
How many days would pass from a New Moon phase to a Full Moon phase?
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$$21$$
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$$28$$
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$$7$$
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$$14$$
Explanation
The day on which the whole disc of the moon is visible is known as the full moon day. Thereafter, every night the size of the bright part of the moon appears to become thinner and thinner. On the fifteenth day, the moon is not visible. This day is known as the new moon day. The next day, only a small portion of the moon appears in the sky. This is known as the crescent moon. Then again the moon grows larger every day. On the fifteenth day once again we get a full view of the moon.
Which of the following describes ecliptic orbit?
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Orbit travelled by the Moon round the Sun.
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Path travelled by the Earth round the Sun
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Orbit along which Sun appears to move among the stars
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Orbit along which Moon appears to move among the stars
Explanation
Path travel by the earth around the sun is elliptical path and sun is located at the one foci.
In which of the following phases of Moon we can see the entire half of the moon surface that is lit?
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Full Moon
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New Moon
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Waning Gibbous
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Last Quarter
Explanation
This happens when Earth is between the moon and Sun and this phase is known as full moon.
During the Full Moon phase, what is the configuration of Moon, Earth, and Sun?
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Moon is between Earth and Sun.
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Earth is between Moon and Sun.
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Sun is between Earth and Moon.
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They are not in a straight line.
Explanation
During the Full Moon phase, Earth is between the Sun and the moon.
During a New moon phase, what is the configuration of Moon, Earth, and Sun?
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Moon is between Earth and Sun.
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Sun is between Moon and Earth.
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Earth is between Moon and Earth.
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They are not in a straight line.
Explanation
New moon refers to the phase when we are not able to see the moon, as moon does not have its own source of light this could happen when sun illuminates the surface of the moon which we do not see that happen. When Sun, Earth and Moon are in line and Moon is between Earth and Sun.
What is the orbital period of halley's comet?
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$$66$$ years
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$$76$$ years
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$$86$$ years
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$$96$$ years
Explanation
Halley's Comet is arguably the most famous comet. It is a "periodic" comet and returns to Earth's vicinity about every 76 years,
So Orbital period of Halley's comet is $$76$$ years.
_______ is earth’s nearest planetary neighbour.
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Mercury
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Venus
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Mars
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Jupiter
Explanation
Venus is earth’s nearest planetary
neighbour. It is the brightest planet in
the night sky.
Venus looks brighter than other planets, because
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It is heavier than other planets
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It has very high density
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It has no atmosphere
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It is closest to the earth
Explanation
Venus is so bright because its thick clouds reflect most of the sunlight that reaches it back into space, and because it is the closest planet to Earth. Venus can often be seen within a few hours after sunset or before sunrise as the brightest object in the sky
The first Indian satellite was launched into space inWhat was it called?
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Aryabhatta
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Rohini
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Insat-1A
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IRS-1A
The Planet Pluto has been abandoned from the group of the conventional planets and kept in the group of dwarf planets by a summit held in
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Paris
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London
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Geneva
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Prague
Explanation
The Planet Pluto has been abandoned from the group of the conventional planets and kept in the group of dwarf planets by a summit held in Prague.
Scientists from the University of Cambridge UK have discovered the smallest star in the universe. It has been named as
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Sirius B
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EBLMJO555-57Ab
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XTEJ165O-500b
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OGLE-TR-122b
Explanation
In 2017, an international team of astronomers announced the discovery of a so-called red dwarf star that's so small it barely functions as a star. Code-named EBLM J0555-57Ab and lying some 600 light-years away, it's similar in size to the planet Saturn.
Which of the following is NOT among the India's earlier Satellites?
1.Aryabhatta
2.Bhaskara
3.APPLE
Rohini
Select among option/options given below:
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2 only
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3 only
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4 only
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None of the above
The Solar System was discovered by
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Gallileo
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Copernicus
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Finsen
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None of these
When was ISRO set up?
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1965
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1969
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1971
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1976
The path of Halley's comet in its orbit around the sun is?
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Elliptical
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Hyperbolic
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Parabolic
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Circular
Explanation
Comets are snowballs of frozen gases, rock, and dust that orbit the Sun. When frozen, they are the size of a small town.
Halley's Comet is arguably the most famous comet. It is a "periodic" comet and returns to Earth's vicinity about every 75 years,
Comets go around the Sun in a highly elliptical orbit. They can spend hundreds and thousands of years out in the depths of the solar system before they return to Sun's proximity.
Hence Halley's comet also move in elliptical orbit around the sun.
Which of the following is correct about Indian Navy?
INS Vikramaditya, India's only Aircraft carrier was taken from United States.
INS Vikrant is a indigenous Aircraft carrier of India.
INS Visakhapatnam is a destroyer ship of Indian Navy.
Select the correct option/options given below:
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1 and 2 only
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1 and 3 only
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2 and 3 only
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All of the above
Which of the following is correct about India's Missile Technology?
Astra is an Anti-Tank Missile.
Nag is an Air-to-Air Missile.
Select the correct option/options given below:
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1 only
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2 only
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Both
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None
A person stood alone in a desert on a dark night and wanted to reach his village which was situated $$5$$km east of the point where he was standing. He had no instruments to find the direction but he located the polestar. The most convenient way now to reach his village is to walk in the___?
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In the direction keeping the polestar to his left .
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In the director opposite to the polestar
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In the direction facing the polestar
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In the direction keeping the polestar to his right
Explanation
The pole star is aligned closely with the celestial North pole of the earth. As a result it appears stationary from the Northern Hemisphere. As the person has to reach his village towards the East, he has to walk such that the pole star is towards the left.
Which was the first satellite launched by India?
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Sputnik
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Aryabhata
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Skylab
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None of these
Explanation
The launch of India's first indigenous satellite, Aryabhata, 46 years ago on April 19, 1975, is celebrated as a landmark in the Indian space programme.
The light from the Sun reaches the Earth in about
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6 min
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4 min
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2 min
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8 min
A shooting star is basically a:
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Comet trail
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Supernova
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Meteor
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Disturbance in atmosphere
Which two planets are gas giants?
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Venus and Mercury
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Saturn and Mars
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Saturn and Jupiter
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Jupiter and Mars
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