51. |
The highest mountains in Africa, which is not part of any mountains chain, is |
|||||||
|
52. |
The limit beyond which the stars suffer internal collapse is called the |
|||||||
|
53. |
The gulf that separates Finland and Sweden in Europe is |
|||||||
|
54. |
The ground water that occurs when flow of the subterranean water is not confined by the presence of impermeable layers is called |
|||||||
|