NCERT Solutions for Class 8 Science Chapter 17

NCERT Solutions for Class 8 Science Chapter 17 Stars and The Solar System (अध्याय 17: तारे एवं सौर परिवार) to Study online or download free in PDF form for session 2020-21 based on new CBSE Syllabus and new NCERT Books.

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NCERT Solutions for Class 8 Science Chapter 17

Class:8
Subject:Science
Chapter 17:Stars and The Solar System

Class 8 Science Chapter 17 Answers

NCERT Solutions for Class 8 Science Chapter 17 Stars and The Solar System is given below to free download updated for 2020-21. Video Format solution is also available for chapter 17 in English and Hindi Medium. Download 8 Science App for offline use.

Class 8 Science Chapter 17 Important Questions for Practice

Name the largest planet of the solar system.

Jupiter is the largest planet in the solar system.
It is so large that about 1300 earths can be placed inside this giant planet. However, the mass of Jupiter is about 318 times that of our Earth.

What is a constellation? Name any two constellations.

The stars forming a group that has a recognisable shape is called a constellation.
Examples: Great Bear, Orion, Cassiopeia and Leo Major.

Why is the distance between stars expressed in light years? What do you understand by the statement that a star is eight light years away from the Earth?

Stars are at a distance of millions of kilometres from the earth. Thus, these large distances are expressed in light years. One light year is the distance travelled by light in one year. One light year is equal to 9.46×〖10〗^12 km.
If a star is eight light years away from the Earth. It means that the time taken by light to travel in eight years. So, the distance between the star and the Earth is given by
8×(9.46×〖10〗^12 )km=7.6×〖10〗^13 km.

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

Venus become visible after sunset that is why it is called evening star. It appears in the western horizon.

Class 8 Science Chapter 17 MCQ with Answers

1. Morning star is the name given to
(a) pole star
(b) star Sirius
(c) planet Jupiter
(d) planet Venus
2. 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
3. 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.
4. 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.
5. 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 parallel 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.
6. State whether the following statements are ‘True’ or ‘False’.
(a) The planet nearest to us is Jupiter.
(b) All the stars are at the same distance from us.
(c) The planets do not emit light of their own.
(d) The planets keep changing their position with respect to stars.
(e) The planet Venus appears in the eastern sky before sunrise.
(f) The plane in which the earth revolves around the sun is called equatorial plane of earth.

Answers of Important Questions

1 (d)
2 (b)
3 (a)
4 (c)
5 (d)
6 (a) False; (b) False; (c) True; (d) True; (e) True; (f) False

NCERT Solutions for Class 8 Science Chapter 17 in PDF
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NCERT Solutions for Class 8 Science Chapter 17 star and the solar system
8 Science chapter 17 answers