Stars

Q.

_______are celestial bodies that emit light of their own.

1. Asteroids

2. Planets

3. Stars

4. Satellites

Q. Why do stars twinkle when we see from the Earth?

1. Because the light coming from the stars travels long distances.
2. Because some parts of the star emit more energy than other parts.
3. Because the light coming from the stars gets refracted by the atmosphere.
4. Because the Earth rotates about its own axis.

Q.

If the speed of light is equal to $3\times {10}^{8}m{s}^{-1}$, how many kilometers will make up 1 light year?

1. $1095$ km

2. $946\times {10}^{13}$km

3. $1.095\times {10}^{11}$km

4. $9.46\times {10}^{12}$km

Q.

‘Twinkle Stars’ is a well-known resort for organising parties, especially for children. However, in the past 6 months, its popularity has reduced considerably as a new resort with better ambience and facilities has opened within its vicinity. Name the related feature of the business environment which has influenced the business of ‘Twinkle Stars’ adversely.

Q. Why do young stars appear blue and old stars red?

1. Because young stars are cooler than old stars.
2. Because young stars are hotter than old stars.
3. Because young stars are far away from the Earth.
   
4. Because the light coming from young stars refract more compare to old stars.

Q. How far is the Moon from the Earth?

1. 300 km
2. 3000 km
3. 300000 km
4. 30000 km

Q. The angle between the orbital and equatorial planes of the Earth is _______ degrees.

1. 23.5
2. 33
3. 47
4. 66.5

Q.

The Dark phase of the moon is called as:

1. Half moon

2. New moon

3. Crescent

4. Full moon

Q.

The splitting of a heavy nucleus into lighter nuclei is known as

1. fusion

2. fission

3. rusting

4. combustion

Q. Name the planet which appears reddish in colour? [1 MARK]

Q.

The first of a month is the new moon day. On fifteenth of the same month, which of the following figures would represent the phase of the moon?

1. 

2. 

3. 

4. 

Q.

All the stars appear to revolve around the Pole star.

1. True

2. False

Q. Which of the following statements about the Sun is incorrect?

1. It is the closest star to Earth.
2. It is the main source of heat and light for our planet Earth.
3. It is made up of gases.
4. It is the biggest star in our galaxy.

Q.

What makes our sun a star?

Q.

What is the colour of the star named Rigel?

1. Orange

2. Blue

3. Red

4. Yellow

Q. How many moons are there in our solar system?

1. 146
2. 181
3. 196
4. 204

Q.

State three features of moon and mercury that have close resemblance. [3 MARKS]

Q. ___ is the Star in red color shown in Orion's right shoulder .

Q. A huge exploding star that ejects most of its mass, is called a

1. stellar nebula
2. black hole
3. white dwarf
4. supernova

Q. WHICH THE CLOSEST CELESTIAL BODY TO OUR EARTH

Q.

One light year is_________

1. $9.46\times$ ${10}^{12}km$

2. $64\times$${10}^{12}km$

3. $84.6\times$ ${10}^{12}km$

4. $96.4\times$ ${10}^{12}km$

Q.

Explain why planet venus is called the morning star and also earths twin

Q.

Which of the following is a statement

1. May you live long!

2. May God bless you!

3. The sun is a star

4. Hurrah! we have won the match

Q.

Statement 1: Only one side of the moon is visible from Earth

Statement 2: The moon completes one revolution around Earth in $27\frac{1}{3}$ days.

1. Both the statements are true. Statement 2 is the correct explanation of statement 1

2. Only statement 1 is true

3. Only statement 2 is true

4. Both the statements are true. Statement 2 is not the correct explanation of statement 1

Q.

If we start observing the earth from 1st January 2001 to 1st January 2005, then it makes___ revolutions around the sun.

Q. Which of the following statements about the Sun is incorrect?

1. It is the closest star to the Earth.
2. It is the main source of heat and light for our planet Earth.
3. It is made up of hot gases.
4. It is the biggest star in our galaxy.

Q.

The size of the visible portion of Moon ___ after the New Moon.

Q. A heavenly body that revolves round the sun is called ____________.

1. Satellite
2. Planet
3. Meteorite
4. Planetoid

Q. why moon revolves around earth not sun$?$

Q. How many solar system are there in the whole universe??