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 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 distinguishes 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 Saturn makes 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.

(c) Mercury is the smallest planet 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 ...............

(c) The group of stars that appears to form a recognizable pattern in the sky is known as.............

(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 in colour 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 actually 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.

How much time does light take to reach us from the Sun?

How much time does light take to reach us from the next nearest star 'Proxima Centauri'?

What is Solar System? Name the different types of celestial objects which are members of the Solar System.

What are planets? How many planets are there in the Solar System?

Name all the planets of the Solar System in the order of their increasing distances from the Sun.

What are inner planets and outer planets? Name them.

Why is it difficult to observe the planet Mercury?

State one way in which the planets can be distinguished from the stars in the night sky.

What are the various environmental conditions available on Earth which are responsible for the existence and continuation of life on Earth?

State one important consequence of each of the following:

(a) Rotation of Earth on its axis.

(b) Motion of tilted Earth around the Sun.

What is a satellite? Name the natural satellite of the Earth.

Moon does not have light of its own. How are we able to see the Moon?

Name the constellation which appears to have the shape of:

(a) a big bear

(b) a distorted W or M

(c) a hunter

(d) a big lion

What are asteroids? Where are they located?

State two differences between the artificial satellites of the Earth and its natural satellite Moon.

What is an artificial satellite? Name any two artificial satellites launched by our country.

State five uses of artificial satellites.

Define light year. How many kilometres make 1 light year?

What is a comet? Name the comet which was last seen in 1986 after a period of 76 years.

When does a comet become visible to us?

What happens to the tail of a comet when it moves far away from the Sun?

What is a meteor? What is the other name of a meteor?

What is the difference between a star and a shooting star?

What are meteorites?

What is the difference between a meteor and a meteorite?

What are meteoroids? Which of two is really a member of the Solar System: Meteoroid or Meteor?

What is the number of prominent stars in the Ursa Major?

Draw a diagram of Ursa Major constellation to show the position of main stars in it.

What is the number of prominent stars in the Orion?

Draw a diagram of the Orion constellation to show the position of prominent stars in it.

What is the number of main stars in the Cassiopeia constellation? Draw a diagram of Cassiopeia constellation to show the position of main stars in it.

What is the number of main stars in Leo Major constellation? Draw a diagram to show the position of main stars in Leo Major constellation.

Explain how you can locate the Pole Star with the help of Ursa Major constellation.

Explain how the position of Sirius Star can be located in the night sky with the help of Orion constellation.

What is the difference between a full Moon and a new Moon? After how many days a full Moon changes into a new Moon?

What is meant by the phases of the Moon? What causes the phases of the Moon?

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

Ursa Major is a:

Which of the following is not a member of the Solar System?

Which of the following is not a planet?

Phases of the Moon occur because:

Which of the following is not a member of the Solar System?

After the Sun, the next nearest star to the Earth is :

The distances between the various celestial objects are usually expressed in the unit of:

Which of the following constellations can be seen in the night sky during the winter season?

A) Orion

B) Ursa Major

C) Leo Major

D) Cassiopeia

The brightest star in the night sky called Sirius is located close to one of the following constellations. This constellation is:

Asteroids revolve around the Sun between the orbits of the planets:

The biggest planet of the solar system is:

The planet with a system of well-developed rings encircling it is:

The two pointer stars the line passing through which points to the direction of pole star are a part of the constellation called:

The smallest planet of the solar system is:

Which of the following are non-luminous objects?

A) Orion

B) Morning Star

C) Moon

D) Pole star

Which of the following planets show phases like the moon?

A) Venus

B) Mercury

C) Jupiter

D) Mars

Which of the following is the hottest planet in the Solar System?

Which of the following constellations are visible in the summer season?

A) Cassiopeia

B) Orion

C) Leo Major

D) Big Bear

The agency responsible for the development of space science programmes in India is :

X is a group of stars which is visible during the summer season in the early part of the night. It can be seen clearly in .the month of April in the northern part of the sky. It resembles a bowl with a handle. It also resembles a big kite with a tail.

(a) What is the general name of groups of stars like X?

(b) Write any two names of X.

(c) Is it a part of our Solar System?

(d) How many bright stars are usually observed in X?

(e) Which famous star can be located in the sky with the help of X?

In which direction do stars appear to move in the sky?

Why do they appear to move in this direction?

The number of main stars in constellation A is 5, in constellation B is 7 in constellation C can be 7 or 8, whereas in constellation D is usually 9. Name the constellations A, B, C and D.

Which star in the night sky can be located with the help of:

(a) Orion constellation?

(b) Ursa Major Constellation

Match items in column A with one or more items in column B:

Column A

(i) Inner planets

(ii) Outer planets

(iii) Constellation

(iv) Satellite of the Earth

Column B

(a) Saturn

(b) Pole Star

(c)Great Bear

(d) Moon

(e) Earth

(f) Orion

(g) Mars