Lakhmir singh solutions science class 8 Solutions for Chapter 17 stars and the solar system

Exercises in Chapter 17 stars and the solar system Grade 8

Exercise

Questions in Exercise

Name any two celestial objects which we can see easily in the night sky.

Name the star (after the Sun) which is closest to the Earth.

Name the star which remains fixed at the same place in the sky in the North.

Name the unit which is used to express distances between the various celestial bodies (like stars and planets).

Why is the distance between stars and planets expressed in light years?

What do you understand by the statement that a star is 8 light-years away from the Earth?

Name the constellation which reminds us of a large ladle or a question mark in the night sky.

In which season of the year is the constellation Orion visible in the sky?

In which season of the year is the constellation Ursa Major visible in the sky?

Give two other names of Ursa Major constellation.

In which season of the year are the following constellations visible in the night sky?

(a) Cassiopeia

(b) Leo Major

Name the biggest planet of the Solar System.

Name the smallest planet of the Solar System.

Which force keeps the members of the Solar System bound to the Sun?

Why does the Sun appear to be bigger and brighter than all other stars?

Which is the main source of heat and light energy for all the members of the Solar System (like planet and satellites, etc.)?

Name a star having a system of planets with life on one of its planets.

Name the planet having a well-developed system of rings around it.

Name the planets which lie between the Sun and the Earth.

How will our Earth look when seen from a space-ship or Moon?

Name the planet

(a) Nearest to the Sun, and

(b) Farthest from the Sun.

Name two planets which have been discovered with the help of a telescope.

Name the hottest planet.

Name two planets which show phases like the Moon.

Name one planet of the Solar System having life on it.

Which characteristics of Mars distinguish it from other planets?

Which planet is known as the red planet?

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

Which characteristic of the planet does Saturn make it unique in the Solar System?

Name two planets which can be seen as 'Morning Star' and 'Evening Star'.

What name is given to the celestial body which revolves around a planet?

Which two planets have asteroids between them?

Name two objects other than planets which are members of the Solar System?

Name the member of the Solar System which appears in the sky like a bright ball of light with a long glowing tail.

Which celestial body is seen as a bright streak of light coming down the night sky?

Which celestial objects are also called minor planets?

Name one natural and one artificial satellite of the Earth.

Name the agency responsible for the development of space science programs in India.

Name the first artificial satellite launched by India.

Name the technique of collecting information about the Earth from an orbiting satellite.

Write the full name of INSAT.

Write the full name of IRS.

Name two constellations which are visible in the sky:

(a) In the summer season.

(b) In the winter season.

State whether the following statements are true or false:

(a) Constellation Orion can be seen only with a telescope.

(b) Pole Star is a member of the Solar System.

(d) Uranus is the farthest planet in the Solar System.

(e) There are nine planets in the Solar System.

(f) Comets are members of the Solar System.

(g) INSAT is an artificial satellite.

Fill in the following blanks with suitable words:

(a) The stars appear to ________ in the sky.

(b) The Sun is a ________ whereas Orion is a ________

(d) The brightest star in the night sky is ________

(e) Ursa Major constellation appears to revolve around the ________ star in the night sky.

(f) Orion constellation can be used to locate the position of ________ star whereas Ursa Major constellation can be used to locate the ________ star in the night sky.

(g) The planet which is farthest from the Sun is ________

(h) The planet which appears reddish is ________

(i) The small heavenly bodies revolving around the Sun between the orbits of Mars and Jupiter are called ________

(j) Asteroids are found between the orbits of ________ and ________

(k) Shooting stars are not ________

(l) A celestial body that revolves around a planet is known as ________

(m) A meteoroid becomes a ________ on entering Earth's atmosphere.

(n) The long-distance transmission of television programmes has been made possible with the help of ________ satellites.

What is meant by 'celestial objects'? Name any three celestial objects.

What is a star? Name the star nearest to the Earth.

Why does Pole Star appear to be stationary in the sky?

Do all the stars in the sky move? Explain.

What is a constellation? Name any two constellations.

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Chapters in this book

Crop Production And Management

Microorganisms: Friends and Foe

Synthetic Fibres And Plastics

Materials: Metals and Non-Metals

Coal And Petroleum

Combustion And Flame

Conservation Of Plants And Animals

Cell Structure And Its Functions

Reproduction In Animals

Reaching The Age Of Adolescence

Force and Pressure

Friction

Sound

Chemical Effect Of Electric Current

Some Natural Phenomena

Light

Stars And The Solar System

Pollution Of Air And Water