DCM Group of Schools
Worksheet
Social Science (Geography)
Class- VI
Chapter-
1The Earth in the Solar System
Q1 Fill in
the blanks:
1.
A group of …………
forming various patterns is called a ………(stars, constellation)
2.
A huge system of
stars is called …………..(galaxy)
3.
………………..is the
closest celestial body of our earth.(moon)
4.
……………….. is the
third nearest planet to the sun.(Earth)
5.
Planets do not
have their own …………….and ………………(light, heat)
Q2. State
whether True or False.
1.
The sun is a
star.(True)
2.
The Ursa Major is
the brightest star.(False)
3.
Ceres is a dwarf
planet.(True)
4.
The moon gets its
light from the earth.(False)
Q3. Tick the
correct answers.
1.
The planet known
as the “Earth’s twin” is
a. Jupiter
b. Venus
c. Saturn
Ans. (b)
2. Which is
the third nearest planet to the sun?
a. Venus
b. Earth
c. Mercury Ans.
(b)
3. All the
planets move around the sun in a
a. Circular
path
b.Rectangular
path
c. Elongated path Ans.
(c)
4. The pole
star indicates the direction to the
a. South
b. North
c. East Ans.
(b)
5. Asteroids
are found between the orbits of
a. Saturn
and Jupiter
b. The Earth
and Mars
c. Mars and Jupiter Ans.
(c)
Q4.Match the
following.
a.
|
Venus
|
I.
|
Between
Mars and Jupiter
|
b.
|
Aryabhatta
|
II.
|
Earth’s
twin
|
c.
|
Asteroids
|
III.
|
Astronomer
|
d.
|
EDUSAT
|
IV.
|
First man
on moon
|
e.
|
Neil Armstrong
|
V.
|
Artificial
satellite
|
Ans.a (II), b
(III), c (I), d (V), e (IV)
Answer the
following questions in one word or sentence:
1.
Name the earth’s
satellite? (Moon)
2.
Which planet has
maximum number of moons? (Saturn)
3.
Which star always
remains in the same position in the sky?
(Pole star)
4.
Which planet is
the closest to the sun?
(Mercury)
5.
What is the
meaning of word ‘Geography’?
Ans. The word ‘Geography’ is made of two Greek words,
‘ge’ meaning ‘earth’ and ‘graphia’ meaning ‘writing’. So this word relates to
the description of earth.
Answer the
following questions in 2-3 lines:
1. What are
celestial bodies?
Ans. The
sun, the moon and all those objects shining in the night sky are called
celestial bodies.
2. Why can we not see the moon during the day?
Ans. We can’t see moon and all bright tiny objects during the
day because the very bright light of the sun does not allow us to see all these
bright objects of the night sky.
3. Mention
two characteristics of stars.
Ans. 1.
Stars are made up of hot, burning gases.
2. Stars
have their own light.
4. What are
constellations? Name any one constellation.
Ans. Stars
occur in certain patterns in the sky. These patterns can be related the shapes
of animals, humans etc. Different groups of stars form various patterns called
constellation.Ursa Major, Leo etc are different constellations.
5. What is
meant by Solar System?
Ans.The sun,
eight planets, satellites and some other celestial bodies like asteroids and
meteoroids form the solar system. We often call it a solar family with the sun
as its head.
Ans. Those
who study the celestial bodies and their movements are called astronomers.
Aryabhatta was a famous astronomer of India.
7. The earth
is also known as a blue planet. Why?
Ans. From
the outer space, the earth appears blue because its two-thirds surface is
covered by water. It is, therefore, called a blue planet.
8. Why is
the constellation of Saptarishi called so?
Ans.
Saptarishi is the most recognizable constellation. It is group of seven stars.
Sapta means seven and Rishi means sages.
9. Why do we
always see only one side of moon?
Ans. The
moon moves around the earth in about 27 days. It takes exactly the same time to
complete one spin. As a result, only one side of the moon is visible to us on
the earth.
10. What is
a dwarf planet? Who take the decision regarding its existence?
Ans. A dwarf
planet is a celestial body that orbits the sun and has a spherical shape but is
not large enough to disturb other objects from its orbit. International
Astronomical Union takes decision regarding its existence.
11.
Differentiate between an astronomer and a scientist.
Ans.
Astronomer- Those who study the celestial bodies and their movements are called
astronomer.
Scientist-A person
who is trained in a science and whose job involves doing scientific research or
solving scientific problems.
Answer the
following questions in 60-70 words:
1. What is
the Universe?
Ans. The
vast space containing all the celestial bodies is called the universe. It
contains millions of galaxies, planets, satellites, stars etc. The universe is
so huge that it is difficult to imagine its size. No one knows whether the
universe is finite or infinite in size.
2. Why is
the earth called a unique planet?
Ans. The
earth is the third nearest planet to the sun. In size, it is the fifth largest planet.
Conditions favourable to support life are probably found only on the earth. The
earth is neither too hot nor too cold. It has water and air, which are very
essential for our survival. The air has life supporting gases like oxygen.
Because of these reasons, the earth is a unique planet in the solar system.
3. Although
the surface temperature of the sun is extremely hot, why do we not feel the
intense heat on the earth?
Ans. The sun
is the ultimate source of heat and light for the solar system. But that
tremendous heat is not felt so much by us because despite being our nearest star,
it is far away from us. The sun is about 150 million KM away from the earth.
The earth’s distance from the sun is such that it creates favorable conditions
to support life on the earth.
4.
Differentiate between stars and planets.
Ans.
Stars
|
Planets
|
1. Stars
are made up of hot, burning gases.
|
1. Planets
are made up of rocks.
|
2. Stars
emit light of their own.
|
2. Planets
shine because of the light they reflect from the sun.
|
3. Stars
twinkle.
|
3. Planets
do not twinkle.
|
4. All
stars are very hot.
|
4. Temperature
of planets depends on their distance from the sun.
|
5. Stars
are very big.
|
5. Planets
are very small as compared to the stars.
|
6. There
are millions of stars.
|
6. Planets
are only eight.
|
5.
Differentiate between planets and moons.
Ans.
Planets
|
Moons(Satellites)
|
1. Planets
revolve around the sun.
|
1. Moons
revolve around planets.
|
2. There
are eight planets in our solar system.
|
2. There
are about 71 moons in our solar system.
|
3. Planets
are natural.
|
3. Satellites
can be natural or artificial.
|
4. Planets
are larger in size.
|
4. Moons
are smaller than planets.
|
6. What is a
satellite? What is the difference between a natural satellite and a human made
satellite?
Ans. A
satellite is a solid heavenly body that revolves around a planet.
Natural
satellite-Satellites moves around the planets in the same way as the planets
move around the sun. Almost all the planets in the solar system have one or
more satellites except Mercury and Venus.
Man- made
satellite- It is an artificial body. It is designed by scientists to gather
information about the universe or for communication. It is carried by rocket
and placed in the orbit around the earth. Some Indian man -made satellites in
space are INSAT, IRS, EDUSAT etc.