Galaxies

Q.

Write the difference between the Galaxy and the constellation.

Q. Study of celestial objects is called ___.

1. astronomy
2. geology
3. astrology
4. astrophysics

Q.

How old is the Universe?

Q.

Moon is a celestial object.

1. True

2. False

Q.

What is responsible for the high and low tides?

1. The gravitational pull of the moon

2. Very strong winds blowing over the water surface.

3. The gravitational pull of Jupiter

4. None of the above

Q. What is expansion of the universe?

Q. The Milky Way Galaxy has

1. elliptical shape
2. spiral shape
3. irregular shape
4. none of these

Q. A family of stars is called a

1. galaxy
2. solar system
3. universe
4. whirling havens

Q. Sun revolves around the centre of Milky Way.

1. True
2. False

Q.

1. constellation
2. galaxy
3. universe
4. none of the above

Q. Community or collection of stars is called:

1. solar system
2. galaxy
3. milky way
4. planet

Q. Celestial bodies are:

1. Sun
2. Moon
3. Spacecraft
4. Planets

Q. Stars in a galaxy are held together by ______.

1. gravity
2. light
3. radiation
4. satellites

Q.

What is inside a blackhole?

Q. The spiral and disc shaped galaxy in which, our solar system is located is named -

1. Andromeda galaxy
2. Cartwheel galaxy
3. Milky way galaxy
4. Sunflower galaxy

Q. The distance between the galaxy Andromeda and Earth is ________ light years.

1. $2\times {10}^6$
2. $3\times {10}^8$
3. $22\times {10}^{16}$
4. $12\times {10}^8$

Q. The time taken by the Sun to revolve around the centre of our galaxy is:

1. 25 million years
2. 100 million years
3. 250 million years
4. 500 million years

Q.

Question 6

Match items in column A with one or more items in column B.
$\begin{array}{cccc}& A& B& \\ \left(i\right)& Innerplanets& \left(a\right)& Saturn\\ \left(ii\right)& Outerplanets& \left(b\right)& Polestar\\ \left(iii\right)& Constellation& \left(c\right)& GreatBear\\ \left(iv\right)& SatelliteoftheEarth& \left(d\right)& Moon\\ \left(v\right)& Stationarybrightstar& \left(e\right)& Earth\\ & & \left(f\right)& Orion\\ & & \left(g\right)& Mars\end{array}$

Q.

Question 6

Match items in column A with one or more items in column B.
$\begin{array}{cccc}& \text{A}& \text{B}& \\ \text{(i)}& \text{Inner planets}& \text{(a)}& \text{Saturn}\\ \text{(ii)}& \text{Outer planets}& \text{(b)}& \text{Pole star}\\ \text{(iii)}& \text{Constellation}& \text{(c)}& \text{Great Bear}\\ \text{(iv)}& \text{Satellite of the Earth}& \text{(d)}& \text{Moon}\\ \text{(v)}& \text{Stationary bright star}& \text{(e)}& \text{Earth}\\ & & \text{(f)}& \text{Orion}\\ & & \text{(g)}& \text{Mars}\end{array}$

Q. The total mass of all stars in Milky Way galaxy is about:

1. $2\times {10}^{41}kg$
2. $2\times {10}^{31}kg$
3. $2\times {10}^{21}kg$
4. $2\times {10}^{11}kg$

Q. Which of the following are the properties of a black hole?

1. Very high mass
2. Low density
3. High density
4. Very high gravitational pull

Q. Which of the following provides clear evidence that the universe is expanding ?

1. the Oort cloud
2. the Kuiper belt
3. Saturn's ring
4. Halley's comet
5. the red shift of distant galaxies

Q. The collection of all things in space together is known as:

1. Universe
2. Star
3. Galaxy
4. Solar system

Q. The billions of stars which occur in the form of groups or clusters are commonly called _______ .

1. galaxies
2. nebula
3. plutons
   
4. stellar

Q. Besides our own galaxy there are about ______ other galaxies scattered all over the universe.

1. 2 billion
   
2. 100 billion
3. 10000 billion
4. 1000000 billion
   

Q. The galaxies are usually classified on the basis of their:

1. Mass
2. Size
3. Shape
4. Any one of the above

Q. Milky Way is moving in local group of galaxies with a speed of:

1. $300lightyears{s}^{-1}$
2. $300lightyears{hr}^{-1}$
3. $300km$ $s^{-1}$
4. $300m$ $s^{-1}$

Q. The Milky Way is the largest galaxy in the Universe.

1. True
2. False

Q. Galaxies are categorized on basis of their shape which includes:

1. spiral shape galaxies
2. elliptical galaxies
3. irregular galaxies
4. all of above

Q. Sun is a part of the galaxy.

1. Andromeda
2. M-49
3. Milky way
4. M-60