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Chapter 17 Stars and the Solar System Solutions

Question - 1 : -
Which of the following is NOT a member of the solar system?
(a) An asteroid
(b) A satellite
(c) A constellation
(d) A comet

Answer - 1 : -

(c) A constellation.

Question - 2 : -
Which of the following is NOT a planet of the Sun?
(a) Sirius
(b) Mercury
(c) Saturn
(d) Earth

Answer - 2 : -

(a) Sirius.

Question - 3 : -
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.

Answer - 3 : -

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

Question - 4 : -
Fill in the blanks:
(1) The planet which is farthest from the Sun is………….
(2) The planet which appears reddish in colour is…………
(3) A group of stars that appear to form a pattern in the sky is known as a……………
(4) A celestial body that revolves around a planet is known as…………
(5) Shooting stars are actually not…………..
(6) Asteroids are found between the orbits of and.…………

Answer - 4 : -

  1. Neptune .
  2. Mars
  3. constellation
  4. satellite
  5. meteors
  6. Mars, Jupiter.

Question - 5 : -
Mark the following statements as True (T) or False (F):
(a) Pole star is a metnber of the solar system.   (   )
(b) Mercury is the smallest planet of the solar system  . (   )
(c) Uranus is the farthest planet in the solar system.   (   )
(d) INSAT is an artificial satellite.   (   )
(e) There are nine planets in the solar system.    (   )
(f) Constellation Orion can be seen only with a telescope.   (   )

Answer - 5 : -

(a) False
(b) True
(c) False
(d) True
(e) False
(f) False.

Question - 6 : -
Match items in column A with one or more items in column B.

A

B

(i) Inner planets

(a) Saturn

(ii) Outer planets

(b) Pole star

(iii) Constellation

(c) Great Bear

(iv) Satellite of the Earth

(d) Moon

(e) Earth

(f) Orion

(g) Mars

Answer - 6 : -


A

B

(i) Inner planets

(g) Mars, (e) Earth

(ii) Outer planets

(a) Saturn

(iii) Constellation

(c) Great Bear, Orion

(iv) Satellite of the Earth

(d) Moon

 

Question - 7 : -
In which part of the sky can you find Venus if it is visible as an evening star?

Answer - 7 : -

Western sky.

Question - 8 : -
Name the largest planet of the solar system.

Answer - 8 : -

Jupiter (Brihaspati).

Question - 9 : -
What is a constellation? Name any two constellations.

Answer - 9 : -

Constellation is a group of stars that appear to form some recognizable shape. For examples, Ursa Major and Orion.

Question - 10 : -
Draw sketches to show the relative positions of prominent stars in:
(a) Ursa Major and (b) Orion.

Answer - 10 : -

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