1.
The earth spins on its own axis, is called as rotation. It spins around north pole to south pole called as axis.
2.
Option C
3.
Option C
4.
Crescent moon can be seen after 2-3 days after the new moon is visible.
5.
Option B
6.
Option B
7.
Revolution of the earth causes change of seasons.
8.
Half moon can be seen after a week and full moon after 2 weeks from the new moon's visibility.
9.
Option B
10.
Option B
11.
Option D
12.
Option D
13.
When moon moves around earth its different parts are lighted up by the sun. We see only the lighted part and so it seems that moon is changing its shape.
14.
The earth seems to be flat but actually it is round like an orange and slightly flat at the poles.
15.
Scientists belived that the earth was formed million of years ago from clouds of dust and gases.
16.
Option B
17.
Big holes on the moon are called craters.
18.
The earth is the third planet from the sun, it is considered to be unique planet due to presence of water and air on it.
19.
Option B
20.
The earth moves all the time and has two types of movements rotation and revolution.
