Q.2. Consider the following statements regarding Dark matter :

1. Dark matter is made up of particles that do not have a charge.

2. Dark matter makes up roughly 68% of the universe.

3. They possess mass like normal matter and hence interact electromagnetic interactions

Q.3. Consider the following statements :

1. Outer space is a zone that occurs about 100 kilometers (60 miles) above the planet.

2. Space is a vacuum, meaning that sound cannot carry because molecules are not close enough together to transmit sound between them

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Q.1.These are very luminous objects in faraway galaxies that emit jets at radio frequencies.They are found in galaxies that have supermassive blackholes which power these bright discs.However, 90 per cent of them do not emit strong radio waves, making this newlydiscovered one special. These are :

A. White holes
B. Quasar
C. Pulsar
D. Stars

Q.2. The corona is the outermost layer of the Sun. It cannot be seen with the naked eye except during a total solar eclipse, or with the use of a coronagraph. Why is the corona so dim ?

A. Its temperature is low.

B. It is far away from earth.

C. It is less dense.

D. Light scatter in the atmosphere.

Q.3. Discrete Aurora’ often in news, related to :

A. Earth
B. Jupiter
C. Mercury
D. Mars

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Q.1. In 2006, International Astronomical Union (IAU) defines criteria to classify any object as a planet.
Which among the following is correct in this context :

1. It needs to be in orbit around any fully fledged star.

2. It needs to have enough gravity to pull itself into a spherical shape.

3. It needs to have atleast one moon orbiting around it.

4. It must be bigger than earth in size

Q.2. Recently, the scientific community has shown a growing interest in studying asteroids. Why do we study asteroids?
Select the most appropriate answer :

A. They have not changed much in billion yrs.

B. They are small in size

C. They are nearest to us

D. They can strike earth

Q.3. In recent times, Scientists are working on making a device which could create artificial gravity in space.
Which among the following is incorrect in this context :

1. Artificial gravity is a force that simulates the effect of gravity in a spaceship.

2. It is caused by the attraction to the Earth.

3. Artificial gravity is based upon centripetal force in a rotating frame of reference.