Fill in the blanks :
1. _________ is the smallest continent of the world.
2. _________ is the second biggest continent.
3. Arctic Ocean has encircled Pole.
4. Southern Ocean has encircled _________ continent.
5. 2/3rd of the Earth is covered by _________
6. _________ continent is called white continent.
7. _________ realm is affected by the three realms of the Earth.