1.
Which is the earth consisting of solid portion?
2.
Which is the largest continent?
3.
What is biosphere?
4.
Which gas is responsible for global warming?
5.
The Arctic Circle passes through
6.
Which longest river flows through Africa?
7.
Which of the following is the smallest continent?
8.
Where is more than 97% of water found on the earth?
9.
Why do humans not use the ocean water?
10.
The earth surrounded by a layer of gases is called