1.
Option B
2.
Option B
3.
Option A
4.
The Solar System is the Sun and all the objects in orbit around it.
5.
A celestial body moving in an elliptical orbit around a star.
6.
0.999
7.
Air consists of 78% nitrogen and 21% oxygen with a small amount of water vapour, carbon dioxide and various other components.
8.
A group of stars forming a known pattern that is named after its apparent form.
9.
Option C
10.
Option A
11.
There are in total eight planets in the solar system.
12.
Option A
13.
Earth revolves in an orbit, earth takes 365 for its revolution and earth revolves around the sun
14.
Option C
15.
Option A
16.
Option B
17.
Option D
18.
Option A
19.
Option A
20.
Option B
