Chapter1.Geography
The Planet Earth and Solar System
Something to know:-
A.Tick the correct
option.
1.What do we call a huge cluster
of
Billions of star?
(C) Galaxy
2.Which one of the following is
the hottest planet?
(B)Venus
3.Which is the most distant
planet from the sun?
(B) Naptune
4.The Planet which does not have
any satellite is-
(A) Venus
5. Which planet has two
satellites?
(D) Mars
B. Fill in the blanks.
1. The vast limitless space which
includes all celestial bodies is called Universe
2. The distance between celestial
bodies is measured in a unit called Light years
3. Pole star always indicates the
north direction.
4. All the planets of our solar
system revolve around the sun in their fixed paths called Orbit.
5. Earth is the third nearest
planet to the sun.
C. Match the following:-
1. Great Bear
-----------------------Constellation
2. Head of solar system-------Sun
3. A giant cloud of gases and
dust------- Nebula
4. Shape of the
earth---------Spherical
5. Red Planet----------Mars.
Inside questions
Q.1.What is universe?
Ans-The vast limitless space
which includes all celestial bodies is called Universe.
Q.2.What is a Galaxy?
Ans-A huge cluster of billions of
stars , along with the gaint collection of gas and dust ,is called a Galaxy.There
are countless stars in the space form huge clusters. One cluster may
contain billions of stars. all the stars in a cluster are held together by
mutual gravitational force. such a huge cluster of billions of stars, along
with the giant collection of gas and dust, is called a galaxy .
Q.3.Where is our solar system
located?
Ans-Our solar system is located
in the Milky Way Galaxy (Akash Ganga).
Q.4.Name the things contained by
Milky Way Galaxy.
Ans-The Milky Way Galaxy contains
a bar across it's center region and two major arms.
Q.5.Where is the Orion Arm
located?
Ans-The Orion Arm is located
between the two major arms of Milky Way Galaxy.
Q.6.What are star?
Ans-Stars are self-luminous
heavenly bodies. They are made up of hot gases. they generate heat and
light and radiate it in the space. The number of stars is countless we do see
all of them at a time. It has been said that, at one time, we can see not more
than 6,000 stars. though, stars are very huge bodies, they look very far away
from the earth.
Q.7.What is the function of
stars?
Ans-The function of the Stars is
to generate heat and light and to radiate them in the space.
Q.8.Name the unit used to measure
the distance between the celestial bodies.
Ans-Light year is used to measure
the distance between the celestial bodies.
Q.9.What is the light year?
Ans- The distance between
celestial bodies is usually measured in a unit known as light year.
Q.10 What is the “Proxima
Centauri”? And it is how much far away from us?
Ans- Some stars are so far away
that the light radiated by them reaches us in millions of years. The
nearest star to the earth, other than the sun, is the “Proxima
Centauri”.It is about 4 [1/2] light years away from us.
Q.11.What do you know about the
milky way galaxy?
Answer a faint white band,
stretching across the sky, is a barred spiral galaxy. it contains a bar across
its centre region and has two major arms. the orion arm is located between two
major arms.
D. Answer the following
questions:-
Q.1. What are celestial bodies?
Ans The sun and, the
star,the moon,the planets and other objects are called celestial bodies. All
the objects which appear smaller to us are the heavenly bodies
Q.2.Why do stars, look very small
in the sky?
Ans Stars look very small in the
sky because they are very far away from us.
Q.3.What is Saptarishi Mandal?
Ans Saptarishi Mandal is a
constellation which consists of seven star looks like a great bear.
Q.4.Name the planets which are
gaseous bodies.
Ans Jupiter, Saturn are planets
which are gaseous bodies.
Q.5.Which planet is closest to
the Neptune?
Ans Uranus is the planet closest
to Neptune
E. Answer the following questions
Q.1. Describe the formation of
solar system.
Ans The sun and it's companion
celestial bodies which consists of solar system. Some scientists believe that a
giant cloud if gases, and dust called the Nebula appeared moving in the space
about 4.6 Billions of years ago . It cooled and gained very fast rotation. The
eight ball of gases of different sizes were separated from the nebula. The remaining
central mass of the Nebula changed in a star known as the sun. The other eight
balls changed into planets.
Q.2.State three features which
make the earth a unique planet.
Ans The three features
are:-
(i) The Earth receives moderate
heat and light from Sun
(ii) About two-thirds area of
Earth is covered with water.
(iii) The Earth has an envelope
of air around it.
Q.3.Mention three characteristics
of a satellite.
Ans The three
characteristics of satellite are :-
(i) The heavenly bodies that
revolve around their respective planets.
(ii) Satellites do not have their
own heat and light.
(iii) They reflect light , which
they receive from the Sun.
Q.4.Give a brief description on
the phases of Moon with the help of a diagram.
Ans The phases of Moon are used
to determine the lunar dates and to fix the duration of lunar months and Arab
countries.The Hindu and the Muslim festivals Such as Deepawali and Eid are
usually fixed on the basis of lunar dates and months.
Q.5.Write a short note on the
other celestial bodies (asteroids, meteoroids and comets in the solar system).
Ans. Asteroids- are rocky,space
objects that orbit our sun.These can be a few feet wide to several hundred
miles wide.
Meteroids- are
little chunks of rock debris in space.They become meteors or shooting stars
when they fall through the earth's atmosphere.
Comets- Comets are
the small bodies with a head and long luminous tail.They are made up of dust
and frozen gases.
Ch-1
Sub- s.st
It is too helpful for the students who can avail this digital facility in the Corona lockdown.
ReplyDeleteNice Blog, thank you.Visit Our Website.
ReplyDeleteOdia Book Nara-Kinnar
Order Odia Books
Odia Books Online