Science Class 7th

491) Closest galaxy to Milky way is?

A) M 60

B) M 87

C) Andromeda

492) The only galaxy seen with naked eye from earth is?

A) M 60

B) M 87

C) Andromeda

493) Spiral galaxies are?

A) Milky way

B) Andromeda

C) M 60

D) Both ‘a’ and ‘b’

494) Which contain old stars?

A) Spiral galaxies

B) Elliptical Galaxy

C) Irregular galaxy

495) Oval shape/ elliptical galaxies are?

A) Messier 32

B) M 60

C) M 87

D) All of these

496) Irregular galaxies having no regular shape and are not common are?

A) Magellanic cloud

B) IC5152

C) Both ‘a’ and ‘b’

497) A star is formed in million of years from?

A) Cloud of gases

B) Dust

C) Both ‘a’ and ‘b’

498) When stars run out of Hydrogen and grow in size they turn into giant.

A) Yellow

B) White

C) Red

D) None

499) Red giants turn into?

A) Blue giants

B) White dwarfs

C) Both ‘a’ and ‘b’

D) None

500) The explosion of white dwarf leads to? 200. The explosion of white dwarf leads to?

A) Death

B) Stars

C) Supernova

D) None

501) The outer layer of star blasts to space and the remaining collapsed core changes into?

A) Neutron Star

B) Black hole

C) Both ‘a’ and ‘b’

D) None

502) Our sun was formed billions years ago.

A) 5

B) 4.5

C) 10

503) After 5 billion years, Sun size will swell up to times.

A) 100

B) 200

C) 50

504) The largest explosion that takes place in space?

A) Bomb blast

B) Hydrogen Bomb

C) Supernova

D) None

505) Light can’t escape the grasp of?

A) Space

B) Supernova

C) Black hole

D) None

506) ______ are formed when a very big object undergoes uncontrolled contraction (a collapse) because of inward pull of its own gravity.

A) Supernova

B) Black hole

C) Neutron Star

D) None

507) Black holes are?

A) Visible

B) Invisible

C) None

508. Presence of Black hole can be felt because of its

A) Force

B) Effects

C) Gravitational field

D) None

509) Every large galaxy contains ____ at its center?

A) Black hole

B) Stars

C) Sun

510) Supermassive black hole at the center of Milky way galaxy?

A) Capricon

B) Andromeda

C) Sagittarius

D) None