YADNYA e-Learning
Science Studies - 6th Standard
16. The Universe
Question And Answer
1. Name these -
(a) Birth place of stars
Ans: Huge nebulae made up of dust particles and gases.
(b) Biggest planet in the solar system
Ans: Jupiter
(c) The galaxy which is our neighbour.
Ans: The Andromeda galaxy
(d) Brightest planet in the solar system
Ans: Venus
(e) Planet with largest number of satellites
Ans: Jupiter
(f) Planets without a single satellite
Ans: Mercury and Venus
(g) Planet with a rotation different from other planets.
Ans: Venus
(h) A celestial body that carries a tail along.
Ans: Comet
2. Fill in the blanks.
(a) The group of galaxies of which our Milky Way is a part is
called local group.
(b) Comets are made of frozen matter and dust particles.
(c) The planet Uranus appears as if it is rolling along its orbit.
(d) Jupiter is a stormy planet.
(e) The Pole Star is the best example of a variable type of star.
3. Say if the statements given below are right or wrong. Rewrite the statements after correcting them.
(a) Venus is the planet closest to the sun- Wrong
Correct Statement- Mercury is the planet closest to the sun.
(b) Mercury is called a stormy planet- Wrong
Correct Statement- Jupiter is called stormy planet.
(c) Jupiter is the biggest planet- Right
4. Answer the following.
(a) What is a special characteristic of the planet Mars ?
Ans: It is the fourth planet in the solar system. As soil on Mars
contain iron its colour is reddish. It also called as Red planet.
The highest and longest mountains in the solar system Olympus Mons is located on Mars.
(b) What are the types of galaxies ?
Ans: There are four types of galaxies- Spiral, Elliptical, Barred
spiral, Irregular
(c) Which celestial bodies does a galaxy include ?
Ans: A group of innumerable stars and their planetary system
are together known as galaxy. It includes celestial bodies
such as clusters of stars, nebulae, clouds of gases, clouds of
dust, dead stars, newly born stars etc. The milky way is the
galaxy in which our solar system is located. The milky way is
a part of the local group of galaxies. It includes many stars
smaller than our sun as well as many other than are
thousands of times biggest than sun.
(d) Name the different types of stars.
Ans: Some types of Stars are- Sun-like star, Red giants stars,
Super Nova, Binary or Twin stars, Variable stars.
(e) What are the types of comets and on what basis are they
classified ?
Ans: A comet is a celestial body that revolves around the sun.
Comets are formed out ice and dust particles. They are part
of the solar system. There are two types of comets based on
the time taken by them to complete revolution around sun.
i) Long periodic comets: These comets take more than
200 years to complete one revolution around the sun.
ii) Short period comets: These comets take less than 200
years to complete one revolution around the sun
(f) What is the difference between meteors and meteorites ?
Ans:
(g) What are the characteristics of the planet Neptune ?
Ans: It is eight planet in solar system. A season on Neptune
lasts for about 41 years. On this planet winds blows with
the extremely high speed. It has 13 satellites. It takes 164
years for one revolution around the sun and 16 hours and
11 minutes to rotate around itself.
5. Match the following.
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