D. None of the above
- What is the name of the central part of the earth?
- How many continent are in the earth?
- The outermost layer of skin is called__________?
- The lowest part of earth is?
- In which layer of atmosphere does commercial aircrafts usually fly?
- Which following is a two terminal three layer device?
- The first artificial satellite on earth is ______________?
- The inner most part of the earth is__________?
- The highest part of earth is?
- Lowest part of the earth is?
- What is the most important effect of the moon on earth?
- How many hemispheres does earth have?