CBSE 8th Standard Science Stars and The Solar System Important Questions And Answers Study Material - QB365 Set C | QB365

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CBSE 8th Standard Science Stars and The Solar System Important Questions And Answers Study Material - QB365 Set C

Published on: 29/10/2025

Question Set C

CBSE 8th Standard Science Stars and The Solar System Important Questions And Answers Study Material - QB365

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Std: 8th Standard CBSE - Science

chapter: Stars and The Solar System - Important Questions And Answers

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Questions:

Which of the following is not a member of the solar system?

(a)

An asteroid

(b)

A satellite

(c)

A constellation

(d)

A comet

Which of the following is not a planet of the sun?

(a)

Sirius

(b)

Mercury

(c)

Saturn

(d)

Earth

Phases of the moon occur because

(a)

we can see only that part of the moon which reflects light towards us

(b)

our distance from the moon keeps changing

(c)

the shadow of the earth covers only a part of the moon's surface

(d)

the thickness of the moon's atmosphere is not constant

Suppose a new planet is discovered between Uranus and Neptune. Its time period would be

(a)

less than that of Neptune

(b)

more than that of Neptune

(c)

equal to that of Neptune or Uranus

(d)

less than that of Uranus

The change in seasons on the earth occurs because

(a)

the distance between the earth and the sun is not constant

(b)

the axis of rotation of the earth is parellel to the plane of its orbit

(c)

the axis of rotation of the Earth is perpendicular to the plane of its orbit

(d)

the axis of rotation of the Earth is tilted with respect to the plane of its orbit

Ursa Major is a

(a)

star

(b)

constellation

(c)

seen only with telescope

(d)

satellite

Which star is nearest to the Earth?

(a)

Pole star

(b)

Cassiopeia

(c)

Orion

(d)

Sun

The of a month is the moon day. On fifteenth of the same month,which of the following figures would represent the phase of the moon?

(a)

(b)

(c)

(d)

The sun appears to move from east to west around the Earth. This means that earth rotates from

(a)

east to west

(b)

west to east

(c)

north to south

(d)

west to north

10.

Morning star is the name given to

(a)

Pole Star

(b)

star Sirius

(c)

planet Jupiter

(d)

planet Venus

11.

What term is used for celestial bodies that revolve around the sun in highly elliptical orbit?

(a)

Comet

(b)

Meteors

(c)

Asteroids

(d)

Planets

12.

Which of the following figures depicts the position of Pole star correctly?

(a)

(b)

(c)

(d)

13.

Which small objects revolve between the orbits of Mars and Jupiter?

(a)

Satellites

(b)

Comets

(c)

Asteroids

(d)

Meteorites

14.

An astronaut standing on the surface of the moon throws a ball upwards. The ball would

(a)

directly fall down from the point it is released

(b)

hang in space

(c)

go up and then come back to the surface of the moon

(d)

keep going up never to come back

15.

Our galaxy is known as

(a)

earth galaxy

(b)

sun galaxy

(c)

milky way

(d)

constellation

16.

Draw sketches to show the relative positions of prominent stars in
(a) Ursa Major (b) Orion

17.

Name two objects other than planets which are members of the solar system.

18.

Mention about the shifting of the Sun towards the south and towards the north

19.

Explain the reason of changing of shape of moon everyday.

20.

Explain the difference between a star and a shooting star in a tabular form.

21.

Explain the reason of not using the moon as a communication satellite.

22.

State whether we can draw the solar system to scale.

23.

Give the name of the planet which is known to have largest number of natural satellites.

24.

State, which planet of the solar system is largest and smallest in size.

25.

Why does the moon change its shape daily?

26.

Explain the difference between a natural and an artificial satellite. Enlist any three applications of artificial satellite.

27.

Explain in brief about planets. How is a planet differ from a star?

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Answers Key:

(a)
Sirius

(a)
we can see only that part of the moon which reflects light towards us

(a)
less than that of Neptune

(a)
the distance between the earth and the sun is not constant

Ursa Major consists of t stars and the group or collection of star is called a constellation, so Ursa Major is a constellation.

(d)
Sun

(b)
west to east

10.

(d)
planet Venus

11.

(a)
Comet

12.

13.

14.

(a)
directly fall down from the point it is released

15.

16.

Sketches are shown as given below:

17.

Asteroids and meteors are the two objects other than planets which are members of the solar system.

18.

When sun is shifting towards the south, then it is called dakshnayan and when the sun shifts towards the south, it is called uttarayan. So, the Sun shifts towards the south from 21 st June and it starts shifting towards north from 22nd December.

19.

Moon reflects the light of the Sun falling on it, thus that part of moon only appears bright which is towards us. The moon along with the Earth revolving around the Sun. As a result, the relative position of the moon continuously changing everyday.

20.

Difference between a star and a shooting star are

Star	Shooting star
Due to air friction, a star does not get destroyed	After entering the atmosphere of the Earth, a shooting star burns due to heat and friction.
A star is very big in size	A shooting star is very very small.
A star is made up of hot gases like hydrogen.	A shooting star is made up of rock and metal.
A star is luminous.	A shooting star has no light of its own

21.

Since, being a natural satellite of Earth, the probability of the moon of getting used as a communication satellite is very negligible (or zero). This is due to some following factors.
(i) Neither the moon has polar orbit nor equatorial due to which the moon as a satellite is useful for different objectives.
(ii) More, the time period of moon is too large (i.e. 27.3 days).

22.

No, we cannot draw the solar system to scale.

23.

The planet which is known to have a largest number of satellites is Jupiter.

24.

Largest planet of solar system is Jupiter and smallest planet is Mercury.

25.

Moon changes its shape daily because it revolves around the Earth and the light from the sun continuously changes due to the presence of Earth between moon and the Sun.

26.

Difference between a natural and an artificial satellite.

Natural satellites	Artificial satellites
Those heavenly bodies which revolve around a planet in their fixed orbits.	Those man made bodies which are fitted with large sensitive instruments and cameras
These are comparatively bigger in size and are made satellites up of rocky materials or gases.	Made to rotate around their planets in pre-fixed orbits. These satellites are much closer to their planet, e.g. Earth.
Example of natural satellite is moon.	Examples of artificial satellite are IRS, INSAT, Kalpana-1, EDUSAT, etc.

Applications of artificial satellites are
(i) These kinds of satellites are used for weather for casting such as rainfall, snowfall, etc.
(ii) For communication purpose such as long distance transmission of telephone calls, TV programmes, internet the artificial satellites are used.
(iii) The natural sources of earth are usually surveyed by the artificial satellites.

27.

Since, the planets are celestial bodies which revolve around the Sun. They do not have their own light due to which they reflect Sun's light. Out of eight planets of solar system, only five are clearly visible to the naked eye. Planets keep changing slightly during the day or after the night with respect to the stars. Difference between stars and planets are

Stars	Planets
Stars have their own light, so they twinkle	Planets do not have their own light. They just reflect the light of the star to which they belong, so planets do not twinkle.
Their number of stars are infinite in the celestial sphere.	Number of planets are only eight in the solar system.
Even the relative distance between stars remains constant	The relative distance between the planets changes with time
These are very big in size. They appear small as they are very far off.	These are relatively smaller
It is a huge mass of extremely hot gases and its temperature very high.	It is made up of rocks and metal and its temperature depends on its distance from the Sun